Service difficulty report · Adc · Boeing 767222

Difficulty date
February 21, 2001
Submitted
March 21, 2001
Operation
Air carrier
Aircraft
N617UA
Make and model
Boeing 767222
Aircraft serial
21877
Aircraft time
65,329 hours, 17,083 cycles
Engine
Pwa JT9D7R4D
Part
Adc
Part number
4040800906
Part serial
82070223
Condition
Malfunctioned
Location
E&E Bay
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

CAPT AND FIRST OFFICER ALTIMETER EXCEED LIMITS AT 10000 FEET AND 250 KTS. GREATER THAN 75 FOOT DIFFERENCE BETWEEN PILOT AND COPILOT ALTIMETERS . AT FL260, 140 FT DIFFERENCE SPEED 332 KTS AT FL310 CAPT ALTIMTER READS 31000 FO READS 30880. STBY ALTIMETER 31104. PROBLEM RE-OCCURRED FLIGHT 0169-24. *S/D* 140FT DIFFERENCE BETWEEN PILOT AND COPILOT ALTIMETERS AT FL260. REPAIRED LEAKS. REPLACED RIGHT AIR DATA COMPUTER. TESTED OK, NO FAULTS FOUND.