What was found
REF DF836, MEASURED 1.2K OHMS TO GND AT PIN 3 OF CONNECTOR D4154P REF WDM 26-11-44, ISOLATED TO UPPER AFT DETECTOR. REPLACED UPPER AFT FIRE LOOP DETECTOR PER AMM. ENGINE FIRE SYSTEM OPS TEST OK.
- Difficulty date
- June 22, 2012
- Submitted
- August 14, 2012
- Operation
- Air carrier
- Aircraft
- N199UA
- Make and model
- Boeing 747422
- Aircraft serial
- 28717
- Aircraft time
- 60,197 hours, 7,065 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2612 · Fire Detection
- Part
- Fire Loop
- Part number
- S332T10017
- Condition
- Faulty
- Location
- Engine
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.