What it covers
The airborne auxiliary power units (APU) installed on aircraft for the purpose of generating and supplying a single type or combination of auxiliary electric, hydraulic, pneumatic or other power. Does not include generators, alternators, hydraulic pumps, etc., or their connecting systems which supply and deliver power to their respective aircraft systems. Use this code for reports of a general nature with insufficient information to file in a specific JASC 4900 series code, or for reports which involve two or more APU systems. An entry "APU" is acceptable if no specific part is reported. The APU as well as aircraft make and model should be reported if known.
Service difficulty reports · 1,839
Reports filed under 4900, newest first.
| 1995 | 39 |
|---|---|
| 1996 | 28 |
| 1997 | 26 |
| 1998 | 9 |
| 1999 | 8 |
| 2000 | 22 |
| 2001 | 22 |
| 2002 | 21 |
| 2003 | 24 |
| 2004 | 25 |
| 2005 | 31 |
| 2006 | 40 |
| 2007 | 81 |
| 2008 | 36 |
| 2009 | 38 |
| 2010 | 37 |
| 2011 | 27 |
| 2012 | 49 |
| 2013 | 47 |
| 2014 | 34 |
| 2015 | 55 |
| 2016 | 45 |
| 2017 | 78 |
| 2018 | 94 |
| 2019 | 65 |
| 2020 | 56 |
| 2021 | 137 |
| 2022 | 192 |
| 2023 | 209 |
| 2024 | 103 |
| 2025 | 103 |
| 2026 | 58 |
SDR AALA202610124788Apu · odorAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO MEM DUE TO THE FLIGHT CREW REPORTING A TOXIC ODOR IN THE FLIGHT DECK - THE AIRCRAFT LANDED SAFELY AT MEM WITHOUT FURTHER INCIDENT. (OPEN)SDR AALA202610104335Vent Line · cokedAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORTED A CRAYON TYPE BURNING SMELL DURING APPROACH AND TAXI AFTER LANDING. SMELL DISSIPATED AFTER SINGLE ENGINE TAXI - MAINTENANCE FOUND THE APU GEARBOX VENT LINE HAD EVIDENCE OF COKING AND REPLACED IT *AALA2026101043SDR DALA2026100805560Apu · odorODOR - APU PLACED ON MEL FOR SMOKE/FUME EVENT AND REQUIRES APU WASH. PERFORMED W/C 4916-2001 AND W/C 4900-2001. CLEANED AND INSPECTED APU REF W/C 4916-2001, CONTAMINATION NOTED AT APU AIR INTAKE AND PLENUM BEFORE CLEANING. RAN APU AFTER CLEANING FOR 20 MINUTE
See all 1,839 reports