SDR I5EA2021062900002

Service difficulty report · Adapter · Boeing 7374B7

Difficulty date: June 29, 2021
Submitted: June 29, 2021
Operation: Air carrier
Aircraft: N440US
Make and model: Boeing 7374B7
Aircraft serial: 25811
Aircraft time: 70,840 hours, 47,820 cycles
System (JASC): 3420 · Attitude and Direction Data System
Part: Adapter
Part number: DG1035AB03
Part serial: 322
Condition: Inoperative
Location: Zone 100
Stage of operation: CL
How discovered: O
Nature of condition: S
Precautionary procedure: A

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

What was found

LOSS OF BOTH ADI'S AND BOTH FLIGHT DIRECTORS, USED STANDBY ADI TO RETURN TO FIELD, EMERGENCY DECLARED. REMOVED AND REPLACED DIGITAL ANALOG ADAPTER IAW B737-400 AMM 34-28-11, OPS CHECKED GOOD. ALSO PERFORMED FLIGHT DIRECTOR CHECK INTHE DFCS BITE CHECK IAW B737-400 AMM 22-11-00, OPS CHECKED GOOD.

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