SDR USAA2012081600008

Service difficulty report · Power Supply · Boeing 737401

Difficulty date: August 15, 2012
Submitted: August 16, 2012
Operation: Air carrier
Aircraft: N422US
Make and model: Boeing 737401
Aircraft serial: 23989
Aircraft time: 63,629 hours, 42,283 cycles
System (JASC): 3350 · Emergency Lighting
Part: Power Supply
Condition: Faulty
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.

What was found

C1 CHECK - EMERGENCY LIGHTS POWER SUPPLY M1137 AT STA 960R HAS TOO HIGH CHARGING VOLTAGE. REPLACED EMERGENCY LIGHTS POWER SUPPLY M1137 IAW B737-400 AMM 33-51-51, OPS CHECK OF EMERGENCY LIGHTS POWER SUPPLY M1137 NORMAL IAW B737-400 AMM 33-51-51.