Flight Training - August 2019 - 49

OPINION

LESSONS FROM THE
737 MAX DEBACLE

KNOW HOW TO DISENGAGE ANY SYSTEM THAT CAN GRAB YOUR CONTROLS
BY PETER A. BEDELL

THE BEST CFIs CHOOSE
TO RENEW WITH THE BEST
AIR SAFETY INSTITUTE
RE-CERTIFIES MORE FLIGHT
INSTRUCTORS THAN ANY
OTHER COURSE PROVIDER

ONLINE

ALEX WILLIAMSON

TWO FATAL CRASHES OF BOEING 737 MAX AIRPLANES within five months took the

lives of 346 people and grounded the fleet. The fallout from the crashes reveals a
potentially too-cozy relationship between Boeing and the FAA when it came to certification of the Max and its new fly-by-wire Maneuvering Characteristics Augmentation
System (MCAS) as well as Boeing's decision to keep pilots in the dark about MCAS.
In the end, pilots could have easily and
quickly saved the flights by simply cutting off
the power to the stabilizer trim system as soon
as a problem was noticed. In the case of Lion
Air, the crew of the flight prior to the accident flight did just that. The problem wasn't
resolved, however, because it's hard to report
an MCAS problem when you don't even know
the system exists.
The Max has larger engines installed
farther forward than the engines on previous
737s, which destabilized the airplane's flight
characteristics at high angles of attack. This
resulted in the installation of MCAS, which
will roll in nose-down trim to aid in recovery
and make the Max handle similarly to other
737 models. This also preserves a common type
rating among all the models. In both accidents,
a faulty (or missing or otherwise damaged)
angle-of-attack sensor caused the airplane
to think that it was in an excessively nose-

PILOTS COULD HAVE
EASILY AND QUICKLY
SAVED THE FLIGHTS
BY SIMPLY CUTTING
OFF THE POWER TO
THE STABILIZER TRIM
SYSTEM AS SOON
AS A PROBLEM
WAS NOTICED.

AOPA.ORG/FT  49

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Flight Training - August 2019

Table of Contents for the Digital Edition of Flight Training - August 2019

Contents
Flight Training - August 2019 - Intro
Flight Training - August 2019 - Cover1
Flight Training - August 2019 - Cover2
Flight Training - August 2019 - Contents
Flight Training - August 2019 - 2
Flight Training - August 2019 - 3
Flight Training - August 2019 - 4
Flight Training - August 2019 - 5
Flight Training - August 2019 - 6
Flight Training - August 2019 - 7
Flight Training - August 2019 - 8
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Flight Training - August 2019 - Cover3
Flight Training - August 2019 - Cover4
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