# AD 82-08-01: Hub Group

- Type: Airworthiness directive
- Status: Current
- Products: Dowty Propellers (c) R.209/4-40-4.5, (c) R.245/4-40-4.5 and (c) R.259/4-40-4.5
- Effective: April 12, 1982
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- Amendment: 39-4356
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1F5510C254AE147786256974005C7F84.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/82-08-01

## The airworthiness directive

82-08-01 DOWTY ROTOL: Amendment 39-4356. Applies to Dowty Rotol Propellers (c)R.209/4-40.5/2, installed on Nihon YS-11 airplanes; (c)R.245/4-40.5/13, installed on Convair Models 600(240D) and 640(340D); and (c)R.259/4-40-4.5/17, installed on Convair Model 640(440D) airplanes, not modified by Dowty Rotol Modification (c)VP2693 in accordance with Dowty Rotol SB No. 61-728, Revision 3, dated July 17, 1981.

Compliance required as indicated unless already accomplished.

To detect and prevent loosening of the propeller blade groups, accomplish the following: (a) Unless already accomplished, within the next 50 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 300 hours' time in service from the last inspection, inspect the locking of the blade groups in the hub group, in accordance with Dowty Rotol Service Bulletin 61-581, Revision 3, dated July 17, 1981, or an FAA-approved equivalent.

  (b) If, during the inspections required by paragraph (a), it is found that the red line position markings across the bearing center race and the hub have separated by more than 0.100 of an inch, before further flight, replace the propeller with a serviceable propeller of the same model number.

  (c) If, during the inspections required by paragraph (a), it is found that the lockpieces on the rear of the cylinder are damaged or they are not engaging with and locking the serrations of the bearing center race of the blade group; or that the set bolts securing the lockpieces are not secure or they are bent; or that the shims under the distance blocks on which the lockpieces are mounted have extruded, before further flight, replace the defective parts with serviceable parts of the same part number.

This AD supersedes AD 67-32-02.

This amendment becomes effective April 12, 1982.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P2EU](https://openairdocs.org/tcds/P2EU): Dowty Propellers; names 3 of 3 models: (c) R.209/4-40-4.5, (c) R.245/4-40-4.5, (c) R.259/4-40-4.5

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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