OpenAirDocs.org

SDR USAA2012020600025

Open the Markdown

Service difficulty report · Unknown · Boeing 737401

FAA SDR system

Difficulty date
February 2, 2012
Submitted
February 6, 2012
Operation
Air carrier
Aircraft
N404US
Make and model
Boeing 737401
Aircraft serial
23886
Aircraft time
62,424 hours, 42,220 cycles
System (JASC)
2450 · AC Power Distribution System
Part
Unknown
Condition
Malfunctioned
Location
Electrical Sys
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

CREW REPORTED THAT AT LIFTOFF IN CLT, THE ENTIRE COCKPIT WENT DARK FOR 3-4 SECONDS. ONCE POWER RESTORED, NO INFORMATION WAS LOST. EVERYTHING WORKED FOR REST OF THE FLIGHT. VOLTS & FREQUENCY'S GOOD ON BOTH GENERATORS. NO CIRCUIT BREAKERS POPPED. MAINTENANCE REPORTED THE NR 1 AND 2 CSD OIL LEVELS GOOD. RAN APU AND BOTH ENGINES. CYCLED ELECTRICAL POWER NUMEROUS TIMES BETWEEN APU AND BOTH GENERATORS. COULD NOT DUPLICATE CONDITION. REPLACED BUS PROTECTIONAL PANEL PER AMM 24-41-21-424-004 AS PRECAUTIONARY. OPS CHECKS GOOD. RAN APU AND BOTH ENGINES AGAIN. NO FAULTS NOTED.