Service difficulty report · Adc · Boeing 767322

Difficulty date
March 8, 2000
Submitted
October 4, 2000
Operation
Air carrier
Aircraft
N664UA
Make and model
Boeing 767322
Aircraft serial
29236
Aircraft time
5,529 hours, 2,014 cycles
Engine
Pwa PW4052
Part
Adc
Part number
4040800906
Part serial
92063285
Condition
Failed
Location
E/E Bay
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
H

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

What was found

DURING CLIMB THRU FL360 FOR FL370 VNAV COMMANDED DESCENT 300 FT, THEN CLIMB. ALTITUDE ALERT PLUS A-P LIGHTS, HORIZONTAL LINE THROUGH FMA, LOST HORIZONTAL FD BAR. DISCONNECTED A-P TO LEVEL OFF. LNAV, ALT HOLD WON''T HOLD MACH. *S/D* LEFT AIR DATA COMPUTER FAILURE ON MCDP. REPLACED LEFT AIR DATA COMPUTER. ACFT DOES NOT HAVE SIMILAR REPORT SINCE LT ADC REPLACEMENT ON MAR 17 00. NO FAULTS DETECTED ON THE AIR DATA COMPUTER.