What was found
MAIN DECK FIRE WARNING SYSTEM GAVE FALSE INDICATION IN FLIGHT, NO FIRE ACTUALLY OCCURED. PERFORMED FIRE/OVERHEAT PROTECTION GROUND TEST IAW B747-400 AMM 26-11-00. TEST PASSED NO DEFECTS AT THIS TIME.
- Difficulty date
- March 19, 2021
- Submitted
- March 23, 2021
- Operation
- Air carrier
- Aircraft
- N701CK
- Make and model
- Boeing 7474B5F
- Aircraft serial
- 26416
- Aircraft time
- 84,678 hours, 15,259 cycles
- System (JASC)
- 2612 · Fire Detection
- Part
- Fire Warning
- Condition
- False Activation
- Location
- Main Deck
- Stage of operation
- CR
- 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.