Service difficulty report · Battery Pack · Boeing 737990ER
FAA SDR system
- Difficulty date
- February 10, 2026
- Submitted
- February 11, 2026
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 60576
- Aircraft time
- 37,980 hours, 11,721 cycles
- Part
- Battery Pack
- Part number
- D71702001
- Condition
- No Test
- Location
- Zone 200
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WORKING T/C 78233001, FOUND FLIGHT DECK DOME EMERGENCY LIGHT INOPERATIVE, EMERGENCY EXIT SIGN AT 16ABC WITH INOPERATIVE LAMPS, & M1672 EMERGENCY EXIT LIGHT BATTERY PACK FAILED A CAPACITANCE CHECK. GROUNDED - YES. REPLACED SECONDARY LAMP OF DOME LIGHT ASSY IAW AMM 33-14-00-960-804. OP CHECKS NORMAL. REPLACED 16ABC EXIT SIGN LAMPS & REPLACED THE SIGN COVER WITH NEW IAW AMM 33-51-01. M1672 BATTERY PACK WAS REMOVED & REPLACED IAW AMM 33-51-06-960-805.