Parts · Instruments and avionics

Adiru

175 failure reports named the adiru in the last ten years, 247 since 1999, most often on the Boeing 737; the condition most often found was "faulted". 2 FAA approvals let 2 companies make a replacement adiru, Honeywell International US LLC holding the most (1).

Reports by year

Reports by year, as a table

	reports
1999	1
2004	6
2005	2
2006	1
2007	2
2008	8
2009	4
2010	6
2011	9
2012	5
2013	12
2014	11
2015	5
2016	5
2017	9
2018	25
2019	19
2020	8
2021	18
2022	18
2023	18
2024	17
2025	16
2026	22

Which system the reports file it under last ten years

Instruments and avionics156Flight controls15Landing gear3Airframe structure1

Reports by system, as a table

	reports
Instruments and avionics	156
Flight controls	15
Landing gear	3
Airframe structure	1

Models most often reporting it last ten years

Boeing 73791Airbus A31921Airbus A32015Bell 42914Airbus A32110Airbus A3306Airbus A3004Boeing 7674Boeing 7173Boeing 7572Boeing 7772Mcdonnell Douglas MD-102

Models most reported, as a table

	reports
Boeing 737	91
Airbus A319	21
Airbus A320	15
Bell 429	14
Airbus A321	10
Airbus A330	6
Airbus A300	4
Boeing 767	4
Boeing 717	3
Boeing 757	2
Boeing 777	2
Mcdonnell Douglas MD-10	2

How it failed the condition found, last ten years

faulted43failed33faulty31unreliable17inoperative13malfunctioned8defective5fault message5unserviceable5none4

Conditions found, as a table

	reports
faulted	43
failed	33
faulty	31
unreliable	17
inoperative	13
malfunctioned	8
defective	5
fault message	5
unserviceable	5
none	4

Engines most often reporting it

CFM International CFM56-5B4/3 1CFM International CFM56-5B7 1CFM International CFM56-7B27 1CFM International CFM56 series 1International Aero Engines V2524-A5 1International Aero Engines V2527-A5 1International Aero Engines V2527E-A5 1Pratt & Whitney PT6A series 1Pratt & Whitney PW4090 1

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a adiru and sell it as an approved part for the models named. These are the companies holding such approvals for a adiru:

Honeywell International US LLC 1Canard Aerospace Corporation 1

For these models most: Airbus A300 (2).

Maker	Part	Replaces	Fits	Granted	Status
Honeywell International US LLC	ADIRU Assembly YG4048AA02	YG4048AA01	Airbus A300 Models B4-601, B4-603, B4-620	2017-04-11	current
Canard Aerospace Corporation	ADIRU Assembly YG4048AA01	Modification Part	Airbus A300 B4-601, A300 B4-603, A300 B4-620	2004-05-16	current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.