SDR SWAA062552

Service difficulty report · Adc · Boeing 7377H4

Difficulty date: July 20, 2006
Submitted: July 21, 2006
Operation: Air carrier
Aircraft: N459WN
Make and model: Boeing 7377H4
Aircraft serial: 32497
Aircraft time: 8,564 hours, 4,679 cycles
System (JASC): 3417 · Air Data Computer
Part: Adc
Part number: C17001CA01
Part serial: 5561
Condition: Faulty
Location: E/E Bay
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

DIVERSION, ON CLIMB OUT OF MDW, OUT OF 18,000 FT AIRSPEED UNRELIABLE AND ALTIMETER DISAGREE FLAG SHOWN. FIRST OFFICER'S AIRSPEED AND ALTIMETER ERRATIC, STANDBY AIRSPEED AND ALTIMETER ERRATIC, BOTH EECS SWITCHES TO SOFT ALTERNATE MODE, BOTH FMCS FAIL. REMOVED AND REPLACED PILOT ADM PER MM. REMOVED AND REPLACED STANDBY ALTIMTER PER MM.

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