# SDR DALA2020032402029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2020
- Submitted: March 24, 2020
- Operation: Air carrier
- Aircraft: [N543US](https://openairdocs.org/aircraft/N543US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26490
- Aircraft time: 73,911 hours, 28,318 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Coupling
- Condition: Disconnected
- Location: Adc
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2020032402029

## Discrepancy

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.

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