Service difficulty report · Coupling · Boeing 757251

Difficulty date
March 22, 2020
Submitted
March 24, 2020
Operation
Air carrier
Aircraft
N543US
Make and model
Boeing 757251
Aircraft serial
26490
Aircraft time
73,911 hours, 28,318 cycles
Part
Coupling
Condition
Disconnected
Location
Adc
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

SHIP 5643 -ATB- ON TAKE OFF F/O SIDE AIRSPEED SLOWLY WENT TO ZERO ALTIMETER FROZE AT ABOUT 1100', WENT THROUGH QRH PROCEDURE AND BROUGHT BACK F/O A/S & ALT W/ AIR DATA SWITCH. SEVERAL EICAS MSGS MACH/SPD TRIM AND RUDDER RATIO DID NOT CLEAR. CORRECTIVE ACTION: FOUND RIGHT ADC STATIC LINE COUPLING DISCONNECTED, REINSTALLED PERFORMED ADC TEST PER AMM SYSTEMS CHECKS GOOD.