Service difficulty report · Battery · Textrn TEXTRON700

Difficulty date
October 14, 2026
Submitted
October 16, 2026
Operation
Air carrier
Aircraft
N850QS
Make and model
Textrn TEXTRON700
Aircraft serial
7000178
Aircraft time
23 hours, 19 cycles
Part
Battery
Condition
Discharged
Location
Zone 200
Stage of operation
TX
How discovered
C
Nature of condition
L
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

EMERGENCY INTERIOR LIGHTS STAYING ON AFTER COMPLETE SHUT DOWN. TRIED TO RESET THE BOXES IN THE COCKPIT BUT UNSUCCESSFUL. GAINED ACCESS TO THE AFT P-BATTERIES LOCATED IN THE AFT CARGO BAY AND GAINED ACCESS TO THE FWD P-BATTERIES LOCATED IN THE COCKPIT. PERFORMED THE EMERGENCY LIGHTING ADJUSTMENT/TEST IN ACCORDANCE WITH AMM 33-50-00. AFTER A COUPLE OF ATTEMPTS, THE P-BATTERY SWITCH LIGHTS CYCLED FROM ON TO OFF, BUT THE EMERGENCY LIGHTS STAYED ON. PERFORMED A BATTERY CHARGE CYCLE IN ACCORDANCE WITH CE 700 AMM 33-50-00-711. PERFORMED THE AFT L/H P-BATTERY INERTIA SWITCH CHECK AND REPEATED THE EMERGENCY LIGHTING ADJUSTMENT/TEST PER CE 700 AMM33-50-00. NO DEFECTS NOTED.