AOPA Pilot Magazine - February 2023 - 98
RUDDER & WRENCH
in 91.417 because, curiously, the regulations
don't seem to require the mechanic to write
it down. As Morrie's experience demonstrates,
sometimes they don't.
Online Access
Exclusive
Free one-year
subscription to
AOPA Pilot Guide
content online
Ask the A&Ps /
THE 42ND
EDITION
Mike Busch, Paul New, and Colleen
Sterling answer your toughest
aviation maintenance questions on
our Ask the A&Ps podcast. Submit
questions to podcasts@aopa.org.
aopa.org/ask-the-a-and-ps
Bahamas & Caribbean Editions
The only COMPLETE RESOURCE
for flying the islands.
Tempest in a teapot
In the meantime, I shared Morrie's correspondence
with my colleague Eric
Svelmoe, an A&P/IA who was a highly
experienced Lycoming engine builder.
Svelmoe said that while the early O-320
engines did use the 7/16-inch exhaust
valves that were the subject of AD 63-2302,
Lycoming switched to more durable
half-inch exhaust valves in the mid-1970s,
and by the time Svelmoe began overhauling
engines in 1980 all the engines he
worked on had the beefier valves. Svelmoe
thought it highly unlikely that an engine
overhauled in 1999 would be equipped
with 7/16-inch valves that Lycoming
stopped using a quarter-century earlier.
Armed with this information, Morrie
met with his IA and suggested that they remeasure
the exhaust valve stem diameters,
this time using a digital caliper instead of
the " calibrated eyeball " method the IA had
previously used. The IA consented, and-
you guessed it-the valve stem diameters
all measured a half-inch. That convinced
the IA that the AD didn't apply to Morrie's
engine after all, and the whole kerfuffle
over it was moot.
There are several important takeaways
from Morrie's ordeal. Owners need
to review each logbook entry they get and
ensure that it includes all the information
that FAR 91.417 requires them to keep. IAs
need to trust maintenance records made
by other mechanics, and not feel obligated
to verify everything from first principles.
Finally, if any mechanic tells you that
your seemingly healthy engine needs
to be torn down, get a second opinion.
mike.busch@savvyaviation.com
Ask the A&Ps /
BUY NOW AOPA.ORG/PILOTGUIDES
Mike Busch, Paul New, and Colleen
Sterling answer your toughest
aviation maintenance questions on
our Ask the A&Ps podcast. Submit
questions to podcasts@aopa.org.
aopa.org/ask-the-a-and-ps
98
AOPA PILOT / February 2023
http://www.AOPA.ORG/PILOTGUIDES
http://www.aopa.org/ask-the-a-and-ps
AOPA Pilot Magazine - February 2023
Table of Contents for the Digital Edition of AOPA Pilot Magazine - February 2023
Contents
AOPA Pilot Magazine - February 2023 - Intro
AOPA Pilot Magazine - February 2023 - Cover1
AOPA Pilot Magazine - February 2023 - Cover2
AOPA Pilot Magazine - February 2023 - Contents
AOPA Pilot Magazine - February 2023 - 2
AOPA Pilot Magazine - February 2023 - 3
AOPA Pilot Magazine - February 2023 - 4
AOPA Pilot Magazine - February 2023 - 5
AOPA Pilot Magazine - February 2023 - 6
AOPA Pilot Magazine - February 2023 - 7
AOPA Pilot Magazine - February 2023 - 8
AOPA Pilot Magazine - February 2023 - 9
AOPA Pilot Magazine - February 2023 - 10
AOPA Pilot Magazine - February 2023 - 11
AOPA Pilot Magazine - February 2023 - 12
AOPA Pilot Magazine - February 2023 - 13
AOPA Pilot Magazine - February 2023 - 14
AOPA Pilot Magazine - February 2023 - 15
AOPA Pilot Magazine - February 2023 - 16
AOPA Pilot Magazine - February 2023 - 17
AOPA Pilot Magazine - February 2023 - 18
AOPA Pilot Magazine - February 2023 - 19
AOPA Pilot Magazine - February 2023 - 20
AOPA Pilot Magazine - February 2023 - 21
AOPA Pilot Magazine - February 2023 - 22
AOPA Pilot Magazine - February 2023 - 23
AOPA Pilot Magazine - February 2023 - 24
AOPA Pilot Magazine - February 2023 - 25
AOPA Pilot Magazine - February 2023 - 26
AOPA Pilot Magazine - February 2023 - 27
AOPA Pilot Magazine - February 2023 - 28
AOPA Pilot Magazine - February 2023 - 29
AOPA Pilot Magazine - February 2023 - 30
AOPA Pilot Magazine - February 2023 - 31
AOPA Pilot Magazine - February 2023 - 32
AOPA Pilot Magazine - February 2023 - 33
AOPA Pilot Magazine - February 2023 - 34
AOPA Pilot Magazine - February 2023 - 35
AOPA Pilot Magazine - February 2023 - 36
AOPA Pilot Magazine - February 2023 - 37
AOPA Pilot Magazine - February 2023 - 38
AOPA Pilot Magazine - February 2023 - 39
AOPA Pilot Magazine - February 2023 - 40
AOPA Pilot Magazine - February 2023 - 41
AOPA Pilot Magazine - February 2023 - 42
AOPA Pilot Magazine - February 2023 - 43
AOPA Pilot Magazine - February 2023 - 44
AOPA Pilot Magazine - February 2023 - 45
AOPA Pilot Magazine - February 2023 - 46
AOPA Pilot Magazine - February 2023 - 47
AOPA Pilot Magazine - February 2023 - 48
AOPA Pilot Magazine - February 2023 - R1
AOPA Pilot Magazine - February 2023 - R2
AOPA Pilot Magazine - February 2023 - R3
AOPA Pilot Magazine - February 2023 - R4
AOPA Pilot Magazine - February 2023 - 49
AOPA Pilot Magazine - February 2023 - 50
AOPA Pilot Magazine - February 2023 - 51
AOPA Pilot Magazine - February 2023 - 52
AOPA Pilot Magazine - February 2023 - 53
AOPA Pilot Magazine - February 2023 - 54
AOPA Pilot Magazine - February 2023 - 55
AOPA Pilot Magazine - February 2023 - 56
AOPA Pilot Magazine - February 2023 - 57
AOPA Pilot Magazine - February 2023 - 58
AOPA Pilot Magazine - February 2023 - 59
AOPA Pilot Magazine - February 2023 - 60
AOPA Pilot Magazine - February 2023 - 61
AOPA Pilot Magazine - February 2023 - 62
AOPA Pilot Magazine - February 2023 - 63
AOPA Pilot Magazine - February 2023 - 64
AOPA Pilot Magazine - February 2023 - 65
AOPA Pilot Magazine - February 2023 - 66
AOPA Pilot Magazine - February 2023 - 67
AOPA Pilot Magazine - February 2023 - 68
AOPA Pilot Magazine - February 2023 - 69
AOPA Pilot Magazine - February 2023 - 70
AOPA Pilot Magazine - February 2023 - 71
AOPA Pilot Magazine - February 2023 - 72
AOPA Pilot Magazine - February 2023 - 73
AOPA Pilot Magazine - February 2023 - 74
AOPA Pilot Magazine - February 2023 - 75
AOPA Pilot Magazine - February 2023 - 76
AOPA Pilot Magazine - February 2023 - 77
AOPA Pilot Magazine - February 2023 - 78
AOPA Pilot Magazine - February 2023 - 79
AOPA Pilot Magazine - February 2023 - 80
AOPA Pilot Magazine - February 2023 - 81
AOPA Pilot Magazine - February 2023 - 82
AOPA Pilot Magazine - February 2023 - 83
AOPA Pilot Magazine - February 2023 - 84
AOPA Pilot Magazine - February 2023 - 85
AOPA Pilot Magazine - February 2023 - 86
AOPA Pilot Magazine - February 2023 - 87
AOPA Pilot Magazine - February 2023 - 88
AOPA Pilot Magazine - February 2023 - 89
AOPA Pilot Magazine - February 2023 - 90
AOPA Pilot Magazine - February 2023 - 91
AOPA Pilot Magazine - February 2023 - 92
AOPA Pilot Magazine - February 2023 - 93
AOPA Pilot Magazine - February 2023 - 94
AOPA Pilot Magazine - February 2023 - 95
AOPA Pilot Magazine - February 2023 - 96
AOPA Pilot Magazine - February 2023 - 97
AOPA Pilot Magazine - February 2023 - 98
AOPA Pilot Magazine - February 2023 - 99
AOPA Pilot Magazine - February 2023 - 100
AOPA Pilot Magazine - February 2023 - 101
AOPA Pilot Magazine - February 2023 - 102
AOPA Pilot Magazine - February 2023 - 103
AOPA Pilot Magazine - February 2023 - 104
AOPA Pilot Magazine - February 2023 - 105
AOPA Pilot Magazine - February 2023 - 106
AOPA Pilot Magazine - February 2023 - 107
AOPA Pilot Magazine - February 2023 - 108
AOPA Pilot Magazine - February 2023 - 109
AOPA Pilot Magazine - February 2023 - 110
AOPA Pilot Magazine - February 2023 - 111
AOPA Pilot Magazine - February 2023 - 112
AOPA Pilot Magazine - February 2023 - Cover3
AOPA Pilot Magazine - February 2023 - Cover4
https://www.nxtbook.com/nxtbooks/aopa/pilot_202405
https://www.nxtbook.com/nxtbooks/aopa/pilot_202404
https://www.nxtbook.com/nxtbooks/aopa/pilot_202403
https://www.nxtbook.com/nxtbooks/aopa/pilot_202402
https://www.nxtbook.com/nxtbooks/aopa/pilot_202401
https://www.nxtbook.com/nxtbooks/aopa/pilot_202312
https://www.nxtbook.com/nxtbooks/aopa/pilot_202311
https://www.nxtbook.com/nxtbooks/aopa/pilot_202310
https://www.nxtbook.com/nxtbooks/aopa/pilot_202309
https://www.nxtbook.com/nxtbooks/aopa/pilot_202308
https://www.nxtbook.com/nxtbooks/aopa/pilot_202307
https://www.nxtbook.com/nxtbooks/aopa/pilot_202306
https://www.nxtbook.com/nxtbooks/aopa/pilot_202305
https://www.nxtbook.com/nxtbooks/aopa/pilot_202304
https://www.nxtbook.com/nxtbooks/aopa/pilot_202303
https://www.nxtbook.com/nxtbooks/aopa/pilot_202302
https://www.nxtbook.com/nxtbooks/aopa/pilot_202301
https://www.nxtbook.com/nxtbooks/aopa/pilot_202212
https://www.nxtbook.com/nxtbooks/aopa/pilot_202211
https://www.nxtbook.com/nxtbooks/aopa/pilot_202210
https://www.nxtbook.com/nxtbooks/aopa/pilot_202209
https://www.nxtbook.com/nxtbooks/aopa/pilot_202208
https://www.nxtbook.com/nxtbooks/aopa/pilot_202207
https://www.nxtbook.com/nxtbooks/aopa/pilot_202206
https://www.nxtbook.com/nxtbooks/aopa/pilot_202205
https://www.nxtbook.com/nxtbooks/aopa/pilot_202204
https://www.nxtbook.com/nxtbooks/aopa/pilot_202203
https://www.nxtbook.com/nxtbooks/aopa/pilot_202202
https://www.nxtbook.com/nxtbooks/aopa/pilot_202201
https://www.nxtbook.com/nxtbooks/aopa/pilot_202112
https://www.nxtbook.com/nxtbooks/aopa/pilot_202111
https://www.nxtbook.com/nxtbooks/aopa/pilot_202110
https://www.nxtbook.com/nxtbooks/aopa/pilot_202109
https://www.nxtbook.com/nxtbooks/aopa/pilot_202108
https://www.nxtbook.com/nxtbooks/aopa/pilot_202107
https://www.nxtbook.com/nxtbooks/aopa/pilot_202106
https://www.nxtbook.com/nxtbooks/aopa/pilot_202105
https://www.nxtbook.com/nxtbooks/aopa/pilot_202104
https://www.nxtbook.com/nxtbooks/aopa/pilot_202103
https://www.nxtbook.com/nxtbooks/aopa/pilot_202102
https://www.nxtbook.com/nxtbooks/aopa/pilot_202101
https://www.nxtbook.com/nxtbooks/aopa/pilot_202012
https://www.nxtbook.com/nxtbooks/aopa/pilot_202011
https://www.nxtbook.com/nxtbooks/aopa/pilot_202010
https://www.nxtbook.com/nxtbooks/aopa/pilot_202009
https://www.nxtbook.com/nxtbooks/aopa/pilot_202008
https://www.nxtbook.com/nxtbooks/aopa/pilot_202007
https://www.nxtbook.com/nxtbooks/aopa/pilot_202006
https://www.nxtbook.com/nxtbooks/aopa/pilot_202005
https://www.nxtbook.com/nxtbooks/aopa/pilot_202004
https://www.nxtbook.com/nxtbooks/aopa/pilot_202003
https://www.nxtbook.com/nxtbooks/aopa/pilot_202002
https://www.nxtbook.com/nxtbooks/aopa/pilot_202001
https://www.nxtbook.com/nxtbooks/aopa/pilot_201912
https://www.nxtbook.com/nxtbooks/aopa/pilot_201911
https://www.nxtbook.com/nxtbooks/aopa/pilot_201910
https://www.nxtbook.com/nxtbooks/aopa/pilot_201909
https://www.nxtbook.com/nxtbooks/aopa/pilot_201908
https://www.nxtbook.com/nxtbooks/aopa/pilot_201907
https://www.nxtbook.com/nxtbooks/aopa/pilot_201906
https://www.nxtbook.com/nxtbooks/aopa/pilot_201905
https://www.nxtbook.com/nxtbooks/aopa/pilot_201904
https://www.nxtbook.com/nxtbooks/aopa/pilot_201903
https://www.nxtbook.com/nxtbooks/aopa/pilot_201902
https://www.nxtbook.com/nxtbooks/aopa/pilot_201901
https://www.nxtbook.com/nxtbooks/aopa/pilot_201812
https://www.nxtbook.com/nxtbooks/aopa/pilot_201811
https://www.nxtbook.com/nxtbooks/aopa/pilot_201810
https://www.nxtbook.com/nxtbooks/aopa/pilot_201809
https://www.nxtbook.com/nxtbooks/aopa/pilot_201808
https://www.nxtbook.com/nxtbooks/aopa/pilot_201807
https://www.nxtbook.com/nxtbooks/aopa/pilot_201806
https://www.nxtbook.com/nxtbooks/aopa/pilot_201805
https://www.nxtbook.com/nxtbooks/aopa/pilot_201804
https://www.nxtbook.com/nxtbooks/aopa/pilot_201803
https://www.nxtbook.com/nxtbooks/aopa/pilot_201802
https://www.nxtbook.com/nxtbooks/aopa/pilot_201801
https://www.nxtbook.com/nxtbooks/aopa/pilot_201712
https://www.nxtbook.com/nxtbooks/aopa/pilot_201711
https://www.nxtbook.com/nxtbooks/aopa/pilot_201710
https://www.nxtbook.com/nxtbooks/aopa/pilot_201709
https://www.nxtbook.com/nxtbooks/aopa/pilot_201708
https://www.nxtbook.com/nxtbooks/aopa/pilot_201707
https://www.nxtbook.com/nxtbooks/aopa/pilot_201706
https://www.nxtbook.com/nxtbooks/aopa/pilot_201705
https://www.nxtbook.com/nxtbooks/aopa/pilot_201704
https://www.nxtbook.com/nxtbooks/aopa/pilot_201703
https://www.nxtbook.com/nxtbooks/aopa/pilot_201702
https://www.nxtbook.com/nxtbooks/aopa/pilot_201701
https://www.nxtbook.com/nxtbooks/aopa/pilot_201612
https://www.nxtbook.com/nxtbooks/aopa/pilot_201611
https://www.nxtbook.com/nxtbooks/aopa/pilot_201610
https://www.nxtbook.com/nxtbooks/aopa/pilot_201609
https://www.nxtbook.com/nxtbooks/aopa/pilot_201608
https://www.nxtbook.com/nxtbooks/aopa/pilot_201607
https://www.nxtbook.com/nxtbooks/aopa/pilot_201606
https://www.nxtbook.com/nxtbooks/aopa/pilot_201605
https://www.nxtbook.com/nxtbooks/aopa/pilot_201604
https://www.nxtbook.com/nxtbooks/aopa/pilot_201603
https://www.nxtbook.com/nxtbooks/aopa/pilot_201602
https://www.nxtbook.com/nxtbooks/aopa/pilot_201601
https://www.nxtbook.com/nxtbooks/aopa/pilot_201512
https://www.nxtbook.com/nxtbooks/aopa/pilot_201511
https://www.nxtbook.com/nxtbooks/aopa/pilot_201510
https://www.nxtbook.com/nxtbooks/aopa/pilot_201509
https://www.nxtbook.com/nxtbooks/aopa/pilot_201508
https://www.nxtbook.com/nxtbooks/aopa/pilot_201507
https://www.nxtbook.com/nxtbooks/aopa/pilot_201506
https://www.nxtbook.com/nxtbooks/aopa/pilot_201505
https://www.nxtbook.com/nxtbooks/aopa/pilot_201504
https://www.nxtbook.com/nxtbooks/aopa/pilot_201503
https://www.nxtbook.com/nxtbooks/aopa/pilot_201502
https://www.nxtbook.com/nxtbooks/aopa/pilot_201501
https://www.nxtbook.com/nxtbooks/aopa/pilot_201412
https://www.nxtbook.com/nxtbooks/aopa/pilot_201411
https://www.nxtbook.com/nxtbooks/aopa/pilot_201410
https://www.nxtbook.com/nxtbooks/aopa/pilot_201409
https://www.nxtbook.com/nxtbooks/aopa/pilot_201408
https://www.nxtbook.com/nxtbooks/aopa/pilot_201407
https://www.nxtbook.com/nxtbooks/aopa/pilot_201406
https://www.nxtbook.com/nxtbooks/aopa/pilot_201405
https://www.nxtbook.com/nxtbooks/aopa/pilot_201404
https://www.nxtbook.com/nxtbooks/aopa/pilot_201403
https://www.nxtbook.com/nxtbooks/aopa/pilot_201402
https://www.nxtbook.com/nxtbooks/aopa/pilot_201401
https://www.nxtbook.com/nxtbooks/aopa/pilot_201312
https://www.nxtbook.com/nxtbooks/aopa/pilot_201311
https://www.nxtbook.com/nxtbooks/aopa/pilot_201310
https://www.nxtbook.com/nxtbooks/aopa/pilot_201309
https://www.nxtbook.com/nxtbooks/aopa/pilot_201308
https://www.nxtbook.com/nxtbooks/aopa/pilot_201307
https://www.nxtbook.com/nxtbooks/aopa/pilot_201306
https://www.nxtbook.com/nxtbooks/aopa/pilot_201305
https://www.nxtbook.com/nxtbooks/aopa/pilot_201304
https://www.nxtbook.com/nxtbooks/aopa/pilot_201303
https://www.nxtbook.com/nxtbooks/aopa/pilot_201302
https://www.nxtbook.com/nxtbooks/aopa/pilot_201301
https://www.nxtbook.com/nxtbooks/aopa/pilot_201212
https://www.nxtbook.com/nxtbooks/aopa/pilot_201211
https://www.nxtbook.com/nxtbooks/aopa/pilot_201210
https://www.nxtbook.com/nxtbooks/aopa/pilot_201209
https://www.nxtbook.com/nxtbooks/aopa/pilot_201208
https://www.nxtbook.com/nxtbooks/aopa/pilot_201207
https://www.nxtbook.com/nxtbooks/aopa/pilot_201206
https://www.nxtbook.com/nxtbooks/aopa/pilot_201205
https://www.nxtbook.com/nxtbooks/aopa/pilot_201204
https://www.nxtbook.com/nxtbooks/aopa/pilot_201203
https://www.nxtbook.com/nxtbooks/aopa/pilot_201202
https://www.nxtbook.com/nxtbooks/aopa/pilot_201201
https://www.nxtbook.com/nxtbooks/aopa/pilot_201112
https://www.nxtbook.com/nxtbooks/aopa/pilot_201111
https://www.nxtbook.com/nxtbooks/aopa/pilot_201110
https://www.nxtbook.com/nxtbooks/aopa/pilot_201109
https://www.nxtbook.com/nxtbooks/aopa/pilot_201108
https://www.nxtbook.com/nxtbooks/aopa/pilot_201107
https://www.nxtbook.com/nxtbooks/aopa/pilot_201106
https://www.nxtbook.com/nxtbooks/aopa/pilot_201105
https://www.nxtbook.com/nxtbooks/aopa/pilot_201104
https://www.nxtbook.com/nxtbooks/aopa/pilot_201103
https://www.nxtbook.com/nxtbooks/aopa/pilot_201103_test
https://www.nxtbook.com/nxtbooks/aopa/pilot_201102
https://www.nxtbook.com/nxtbooks/aopa/pilot_201011demo
https://www.nxtbook.com/nxtbooks/aopa/pilot_201011
https://www.nxtbook.com/nxtbooks/aopa/pilot0308
https://www.nxtbookmedia.com