What was found
FIRE WARNING BELL AND MASTER WARNING LIGHTS CONTINUE GOING RANDOMLY EVERY 1 TO 5 MINUTES. RPLD 2 OF MASTER MONITOR CARDS. 3 OF FIRE/OVHT CARDS A21. A22. A23. SYS TEST PASSED BY CMC. NO WARNING HORN & LT OCCURRED.
- Difficulty date
- April 28, 2017
- Submitted
- April 29, 2017
- Operation
- Air carrier
- Aircraft
- N116UA
- Make and model
- Boeing 747422
- Aircraft serial
- 26908
- Aircraft time
- 72,462 hours, 8,109 cycles
- System (JASC)
- 2612 · Fire Detection
- Part
- Circuit Card
- Part number
- 4500001B
- Part serial
- 1855
- Condition
- Faulty
- Location
- E&E Bay
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.