SDR C1HA200297033

Service difficulty report · Adc · Boeing 727270

Difficulty date: December 12, 2002
Submitted: January 9, 2003
Operation: Air carrier
Aircraft: N697CA
Make and model: Boeing 727270
Aircraft serial: 23052
Aircraft time: 50,045 hours, 21,922 cycles
System (JASC): 3417 · Air Data Computer
Part: Adc
Stage of operation: CL
How discovered: V
Nature of condition: G
Precautionary procedure: B

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

What was found

ON INITIAL CLIMB OUT OF LAS AIR DATA COMPUTER CIRCUT BREAKER POPPED. COMPLETED THE " CIRCUT BREAKER OPEN" CHECKLIST RESET CIRCUT BREAKER ONCE. CAPT'S AIRSPEED INDICATOR FAILED, GPWS FAILED, TRANSPONDER MODE C FAILED, LAS ALTITUDE REPORTER FAILED, SUSPECT ADC BAD.REMOVED AND REPLACED AIR DATA COMPUTER #1, SYSTEM OPS CK NORMAL. IAW 727M/M 34-12-0 PAGE 7, 34-12-11 PAGE 401.