SDR 9711639911

Service difficulty report · Servo · Doug DC931

Difficulty date: June 14, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N961N
Make and model: Doug DC931
Aircraft serial: 47405
System (JASC): 3422 · Directional Gyro and Indicating System
Part: Servo
Condition: Failed
Location: Nr 1 Compass
Stage of operation: CL
Nature of condition: O
Precautionary procedure: A

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

What was found

DURING CLIMBOUT, NR 1 COMPASS STARTED AN IMMEDIATE DRIFT WITH NO SLAVING WHEN ALIGNED TO PROPER HEADING. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED NR 1 COMPASS RACK, SERVO, AND SLAVE AMPLIFIERS, OPERATIONAL CHECK NORMAL.

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