# SDR H5O2008F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2007
- Submitted: January 24, 2008
- Operation: Air carrier
- Aircraft: [N46969](https://openairdocs.org/aircraft/N46969), registered now
- Make and model: Bell UH-1B
- Registry model: [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b) (OpenAirDocs)
- Aircraft serial: 638548
- System (JASC): [6730 · Rotorcraft Servo System](https://openairdocs.org/jasc/6730)
- Part: Liner
- Part number: 2040012741
- Condition: Worn
- Location: Pilot Collective
- 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/H5O2008F00000

## Discrepancy

PILOT EXPERIENCED COLLECTIVE BOUNCE ON TAKEOFF.  INSPECTION OF COLLECTIVE LINERS SHOWED SUFFICIENT AMOUNT OF LINER REMAINING IN THE WEAR AREA.  WITH FURTHER INSPECTION, THE MINIMUM COLLECTIVE FRICTION WAS TOO LOW.  INSPECTION ON NR 3 AND NR 6 PHASE IAW TM 55-1520-219-PMS, PAGE 6 ITEM NR 2.14 REQUIRES TO INSPECT COLLECTIVE FRICTION LINERS FOR WEAR.  ADJUSTMENT OF MINIMUM COLLECTIVE FRICTION SHOULD ALSO BE INCLUDED IN THE PHASE INSPECTION CHECKLIST ALONG WITH VISUAL INSPECTION OF THE LINERS.  (K)

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