Service difficulty report · Battery Pack · Boeing 737990ER

Difficulty date
January 18, 2026
Submitted
January 20, 2026
Operation
Air carrier
Aircraft
N483AS
Make and model
Boeing 737990ER
Aircraft serial
36350
Aircraft time
38,500 hours, 11,881 cycles
Part
Battery Pack
Part number
ADD71701100
Condition
Inoperative
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 PERFORMING T/C 78233008, FOUND CABIN OVERWING EXIT SIGNS NOT ILLUMINATED. GROUNDED - YES. R & R THE LT & RT OVERWING BATTERY PACKS REF AMM 33-51-06-960-805. OPS TEST PASSED.