Service difficulty report · Air Data Comp · Boeing 727233

Difficulty date
January 7, 1998
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N257FE
Make and model
Boeing 727233
Aircraft serial
20939
Part
Air Data Comp
Part number
HG480B13
Condition
Failed
Location
E/E Compt
Stage of operation
CL
Nature of condition
G
Precautionary procedure
A

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

What was found

98-0011 - ON CLIMB-OUT (APPROX 2000FT) CAPTAIN LOST AIRSPEED, ALTIMETER, GPWS. SUSPECTED NR 1 AIR DATA COMPUTER FAILURE. ALL CIRCUIT BREAKERS CHECK, NONE TRIPPED. RED TABS COMPLIED WITH. REMOVED AND REPLACED NR 1 AIR DATA COMPUTER. PERFORMED LOW LEVEL LEAK OF CAPTAINS'S PITOT/STATIC SYSTEM. LEAK CHECKS GOOD. AIR DATA COMPUTER FUNCTION TEST IS GOOD. ALTIMETER ALERT AND GPWS CHECK GOOD.