Service difficulty report · Drive Unit · Lear 45LEAR

Difficulty date
June 10, 2012
Submitted
July 16, 2012
Operation
Air carrier
Aircraft
N904HD
Make and model
Lear 45LEAR
Aircraft serial
0149
Aircraft time
4,179 hours, 2,828 cycles
Part
Drive Unit
Part number
C444833
Part serial
1492X
Condition
Defective
Location
Te Flaps
Stage of operation
AP
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

THE CREW REPORTED THAT DURING APPROACH TO LANDING THE FLAPS WOULD FAIL BETWEEN 30 DEGREES AND 40 DEGREES. EXTENSIVE TROULESHOOTING UNDER THE GUIDENCE OF TECH SUPPORT FOUND THE FLAP POWER UNIT DEFECTIVE. UNIT WAS REPLACED WITH A MODIFIED FLAP DRIVE UNIT. THIS FLAP DRIVE UNIT WAS INSTALLED IN MARCH 2012 AT 4122.4 HRS TOTAL IN SERVICE 56.6 HRS BEFORE THIS FAILURE AND WAS A REPAIRED UNIT.