Service difficulty report · Adc · Boeing 75724APF

Difficulty date
April 21, 2026
Submitted
April 22, 2026
Operation
Air carrier
Aircraft
N436UP
Make and model
Boeing 75724APF
Aircraft serial
25467
Aircraft time
32,224 hours, 20,959 cycles
Part
Adc
Part number
4080800912
Part serial
88061327
Condition
Faulty
Location
Zone 100
Stage of operation
CL
How discovered
O
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

EMERGENCY DECLARED, AIRSPEED UNRELIABLE INDICATIONS DURING CLIMBOUT. FLT CREW REPORTS AIRSPEED DROPPED OFF DURING CLIMB OUT. FOUND LT ADC FAULTING DUE TO LT & RT EEC EICAS MSG'S AND EEC FAULT CODES RELATING TO ADC FAULTS. R & R LT ADC WITH A SERVICEABLE UNIT IAW AMM 34-12-01. OPS CK GOOD. SYSTEM OK FOR CONTINUED SVC AT THIS TIME.

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