What was found
EMERGENCY LIGHT SYSTEM OPERATIONAL TEST FAILED FOR ALL LIGHTS ASSOCIATED WITH BATTERY PACK M2335.TIPR833K. GROUNDED - YES. REMOVED AND REPLACED M2335 EMERGENCY POWER SUPPLY IAW B737-900 AMM 33-51-06, OPS CHECK GOOD.
- Difficulty date
- March 7, 2023
- Submitted
- March 9, 2023
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 34,595 hours, 10,958 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- D71702001
- Condition
- Failed
- Location
- Main Passenger C
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.