What was found
EMERGENCY LIGHT BATTERY AND CHARGER M1673 FAILED BATTERY CAPACITANCE CHECK. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY POWER SUPPLY M1673 S/N 303007 AND PERFORMED SUCCESSFUL SYSTEM OP CHECK IAW AMM 33-51-06-960-806.
- Difficulty date
- April 28, 2019
- Submitted
- May 16, 2019
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 21,949 hours, 7,201 cycles
- System (JASC)
- 3350 · Emergency Lighting
- Part
- Power Supply
- Part number
- D71702001
- Condition
- Failed
- Location
- Cabin
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.