What was found
DURING FIRE/OVHT TEST MASTER WARNING, MASTER CAUTION LIGHTS DID NOT ILLUMINATE. REMOVED AND REPLACED MASTER WARNING MODULE (M618) REF AMM 31-51-04-4 OPS TEST GOOD. A/C OK FOR SERVICE. WEU BOARD, PN 285T0032-19, SN F20543.
- Difficulty date
- April 4, 2025
- Submitted
- April 7, 2025
- Operation
- Air carrier
- Aircraft
- N921FD
- Make and model
- Boeing 75728A
- Aircraft serial
- 24924
- Aircraft time
- 79,396 hours, 28,736 cycles
- System (JASC)
- 2600 · Fire Protection System
- Part
- Module
- Part number
- 285T003219
- Condition
- Faulted
- Location
- Zone 200
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.