# SDR GTIA050038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2005
- Submitted: April 11, 2005
- Operation: Air carrier
- Aircraft: N811NK
- Make and model: Doug DC-9-81(MD-81)
- Registry model: [Doug DC-9-81(MD-81)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-81-md-81) (OpenAirDocs)
- Aircraft serial: 48017
- Engine: Pwa JT8D217C
- System (JASC): [7711 · Engine Pressure Ratio (EPR)](https://openairdocs.org/jasc/7711)
- Part: Line
- Condition: Broken
- Location: Epr
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA050038

## Discrepancy

ENGINE INDICATIONS DO NOT MATCH OBSERVED ENGINE PERFORMANCE WHEN OPERATING AT T/O POWER AND CRUISE, NR1 EPR IS BELOW EXPECTED.  AIRCRAFT TAIL SWAP WITH 833.  T/S NR 1 ENGINE AND FOUND NO LEAKS, PROBLEM SEEMS TO BE ON NR 2 ENGINE PT2 AND PT7 LINES, CHECKED OKAY, BLEW OUT PT2 PORT FOR OBSTRUCTION, NONE FOUND.  NR 2 ENGINE READING LOW DUE TO A BROKEN PT2 FLEX LINE ON THE EPR TRANSMITTER, REMOVED AND REPLACED EPR TRANSMITTER.  OPS CHECK AND ENGINE RUN-UP NORMAL.  (K)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.