What was found
NR 4 ENGINE SQUIB TEST FAILS TEST NR 2 REF NR 3 SVC. DEFERRED DUE TIME, COMPLIED WITH MEL 2621ZF. INTEGRITY TEST OK. REPLACED SQUIB TEST MODULE PER AMM. TESTS NORMAL.
- Difficulty date
- October 29, 2012
- Submitted
- December 3, 2012
- Operation
- Air carrier
- Aircraft
- N122UA
- Make and model
- Boeing 747422
- Aircraft serial
- 29168
- Aircraft time
- 55,448 hours, 6,500 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2620 · Extinguishing System
- Part
- Module
- Part number
- 233U42039
- Condition
- Failed
- Location
- Nr 4 Engine
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.