AOPA Pilot Magazine - March 2021 - 94

P&E

SAVVY MAINTENANCE

The single most frequent kind of maintenancerelated accident cause is installation errors
involving the powerplant.

94 | 

fatalities, or both. Because installation
errors were so deadly, the FAA analysts
drilled down further. They found that the
majority of installation errors involved the
powerplant (56 percent), followed by flight
controls (13 percent), landing gear (10 percent), rotorcraft rotors (10 percent), and
electrical (5 percent).
The type of errors included incorrect
attachment (29 percent), incorrect connection (22 percent), omission (22 percent),
wrong part installed (17 percent), and
reversed installation (10 percent). Almost
all (91 percent) of the installation errors

were made by certificated A&P mechanics,
with only 9 percent by uncertified personnel. The vast majority (86 percent) resulted
in emergency landings-two-thirds of
which involved injuries, fatalities, or both-
with only 14 percent ending up returning
to the departure airport or continuing to
the destination.
While more than half the installationerror accidents involved the powerplant,
installation errors involving flight controls or the electrical system were the most
likely to result in injury or death. The highest percentage of injury/fatality accidents by

system were electrical system (73 percent),
flight controls (69 percent), powerplant (62
percent), and rotor system (52 percent).
The FAA study ended with a discussion
section in which the analysts pointed out
that the percentage of GA accidents they
attributed to maintenance (7.1 percent) is
far lower than other well-respected studies that have found the rate to be close to 20
percent. The study authors attributed this
discrepancy to the NTSB's methodology of
codifying accident causes and contributing
factors in a way that the analysts believed
often failed to assign a maintenancerelated code to accidents that were actually
maintenance-related. " As a result, there are
probably many more maintenance-related
accident reports in the NTSB Database that
were not included in this study because
they were not designated with a maintenance code, " the study concluded.
The authors pointed out that while
helicopters comprise only 3 percent of
the GA fleet, they were involved in 12.4

FASTER, STRONGER, MORE
GARMIN TXi PANEL
AVAILABLE WITH AUTOPILOT

FAA IFR CERTIFIED
EXTENDED LANDING GEAR

(307) 317-5550

AVIATAIRCRAFT.COM/AOPA
Photo: Erik Johnston | ©2021 Aviat Aircraft Inc

http://www.AVIATAIRCRAFT.COM/AOPA

AOPA Pilot Magazine - March 2021

Table of Contents for the Digital Edition of AOPA Pilot Magazine - March 2021

Contents
AOPA Pilot Magazine - March 2021 - Intro
AOPA Pilot Magazine - March 2021 - Cover1
AOPA Pilot Magazine - March 2021 - Cover2
AOPA Pilot Magazine - March 2021 - Contents
AOPA Pilot Magazine - March 2021 - 2
AOPA Pilot Magazine - March 2021 - 3
AOPA Pilot Magazine - March 2021 - 4
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AOPA Pilot Magazine - March 2021 - Cover3
AOPA Pilot Magazine - March 2021 - Cover4
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