SDR S02234040

Service difficulty report · Transponder · Boeing 747200

Difficulty date: November 17, 2002
Submitted: November 22, 2002
Operation: Air carrier
Make and model: Boeing 747200
Aircraft serial: 24308
Engine: Pwa JT9D7R4G2
System (JASC): 3452 · ATC Transponder System
Part: Transponder
Condition: Failed
Location: Atc
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

BOTH ATC TRANSPONDER FAILED LIGHT ILLUM. BEFORE T/O. ATC CONTROL PANEL REPLACED NR 2 ATC NML IAW 34-53-00 T/S BUT NR 1 ATC STILL NO GOOD IAW MEL 34-26 SAFE FOR FLIGHT,ITEM C/F TO D/D PAGE D0045481 CAT "C". THE ATC FRONT PANEL TEST SWITCH LOST THE BITE TEST FUNCTION, REPLACED THE ATC TRANSPONDER. THE ATC CONTROL PANEL J1,J2 SOME TIME POOR CONTACT, REPLACED THE DB9011A J1, DB9011B J2 ATC CONTROL PANEL CONNECTOR & THE WIRE W037-SX1024-22 ALSO POOR CONTACT .

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