# SDR RYNA200500013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2005
- Submitted: April 18, 2005
- Operation: Air carrier
- Aircraft: [N753NA](https://openairdocs.org/aircraft/N753NA), registered now
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft serial: 24544
- Aircraft time: 58,755 hours, 16,772 cycles
- Engine: Rroyce RB211535E4
- System (JASC): [7540 · Bleed Air Indicating System](https://openairdocs.org/jasc/7540)
- Part: Tube
- Part number: LJ35801
- Condition: Cracked
- Location: Nr 2 P1 Probe
- 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/RYNA200500013

## Discrepancy

DURING CLIMB FROM ORD, THE NR 2 ENGINE N1 WAS INDICATING .16 LOWER THAN THE NR 1 ENGINE.  THE AIRCRAFT RETURNED TO ORD AND LANDED WITHOUT INCIDENT.  REMOVED AND REPLACED CRACKED TUBE OFF NR 2 ENGINE P1 PROBE.  OPERATIONAL CHECK NORMAL.

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