# SDR QMLA2013091213133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2013
- Submitted: September 17, 2013
- Operation: Air carrier
- Aircraft: [N952AL](https://openairdocs.org/aircraft/N952AL), registered now
- Make and model: Urocop EC135T2
- Registry model: [Urocop EC135T2](https://openairdocs.org/model/eurocopter-deutschland-ec135t2) (OpenAirDocs)
- Aircraft serial: 0627
- Aircraft time: 2,536 hours, 7,466 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot Tube
- Part number: PH500BKW
- Part serial: 1663
- Condition: Clogged
- Location: Right
- Part time: 2,536 hours, 7,466 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2013091213133

## Discrepancy

DURING CRUISE FLIGHT, AIRSPEED SUDDENLY INDICATED 30 KTS HIGHER THAN WHAT WAS REAL.  UPPER MODES OF THE AUTO PILOT WOULD NOT FUNCTION AND A "DECOUPLE" LIGHT CAME ON ON THE CAD.  ALSO, UNTIL ADC NR 2 WAS TURNED OFF, THE HIGH NR MODE WOULD NOT WORK.  THE NORMAL PROCEDURE IS TO SWITCH THE ADC TO NR 1 AND  HAVE PROPER AIRSPEED INDICATION. AFTER DOING SO, ACFT WAS LANDED AT HELIPAD WITHOUT ANY PROBLEM AND HIGH NR RESTORED THEN MX WAS CONTACTED.

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