Service difficulty report · Computer · Lear 45LEAR

Difficulty date
January 20, 2005
Submitted
February 2, 2005
Operation
Air carrier
Aircraft
N410FX
Make and model
Lear 45LEAR
Aircraft serial
101
Aircraft time
3,726 hours, 2,817 cycles
Part
Computer
Condition
Malfunctioned
Location
Stall Warning
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

DURING TAKEOFF ROLL, AMBER LEFT STALL WARN FAIL CAS ANNUNCIATED AT 80 KIAS. CREW ABORTED TAKEOFF WITHOUT INCIDENT. CREW NOTED THAT STALL WARNING TESTED CORRECTLY AND THAT THE AOA INDICATOR REMAINED AT 12 O'CLOCK POSITION WITH VANES BEING MOVED BY HAND. PERFORMED FSR RECOMMENDATIONS: 1. SWAP STALL WARNING COMPUTERS AND RETEST. IF AOA VANES CONTINUE NOT TO MOVE. VIA MCOS - STALLS, VIEW VANE AOA DATA AND NOTE POSITION CHANGE WITH ACTUAL VANE MOVEMENT. NOTE ANY CURRENT OR STORED FAULTS. MX PULLED THE ACFT INSIDE AND LET IT SIT FOR ABOUT 3 HOURS AND NOW THE STALL TEST WORKS. MX REPLACED THE STALL WARNING COMPUTER. OPS CHECK NORMAL. AIRCRAFT HAS BEEN PARKED OUTSIDE IN TEMPS REACHING -45 DEGREES FOR PAST TW