SDR UIEA2026070200567

Service difficulty report · Adc · Boeing 74747UF

Difficulty date: July 2, 2026
Submitted: July 7, 2026
Operation: Air carrier
Aircraft: N476MC
Make and model: Boeing 74747UF
Aircraft serial: 29256
Aircraft time: 105,135 hours, 19,139 cycles
System (JASC): 3417 · Air Data Computer
Part: Adc
Part number: 4040800911
Part serial: 31119249
Condition: Faulted
Location: Zone 100
Stage of operation: CR
How discovered: O
Nature of condition: G, J
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 RT ADC, AND RT AOA IN FLIGHT WITH C/B TRIPPED. R & R RIGHT ADC IAW AMM 34-12-01-401, REV 116 & IPC 34-12-01-01B, REC 92. IAW FIM TASK 34-12 TASK 869 IAW CMC MSG 34653. PERFORMED GRD TEST OF RIGHT ADC IAW AMM 34-12-00/501. ALL TEST PASSED.

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