SDR BAQA093829

Service difficulty report · Control Unit · Bolkms BK117C1

Difficulty date
March 12, 2004
Submitted
March 29, 2004
Operation
Air carrier
Aircraft
N911TG
Make and model
Bolkms BK117C1
Aircraft serial
7506
Aircraft time
5,172 hours
Engine
Tmeca ARRIEL1
Part
Control Unit
Part number
117884141
Part serial
024101
Condition
Failed
Location
Autopilot
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

YAW CSAS MADE UNCOMMANDED YAW OSCILLATIONS IN NORMAL AND STANDBY MODE AT APPROX. TWO SECOND INTERVALS. UNIT WAS INSTALLED 02/16/2004 AT A/C TT 5145.8 AND WAS REMOVED 03/12/2004 AT A/C TT 5172.2 FOR A TOTAL OF 26.4 HOURS. LAST REPAIR REF RO 9-090006-18 MMIR CLAIM NR 91640 (ALSO A WARRANTY REPAIR FOR UNIT FAILING OUT OF BOX). THIS WILL BE THE THIRD REPAIR ON THIS UNIT IN 8 MONTHS.