# AD 67-22-08: Fuel Flow Controls

- Type: Airworthiness directive
- Status: Current
- Products: Rolls-Royce Deutschland Spey 506-14
- Effective: August 25, 1967
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-451
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3DE6EFD1EFC5F57C862569D00072E42B.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/67-22-08

## The airworthiness directive

67-22-08 ROLLS-ROYCE: Amdt. No. 39-451, Part 39, Federal Register July 26, 1967. Applies to Spey Model 506-14 Engines.

Compliance required as indicated, unless already accomplished.

To prevent failure of the C.A.S.C. 105 and 125 Lucas fuel flow controls installed on Spey Model 506-14 engines due to wear of the splines on the input drive assembly, accomplish the following:

  (a) For fuel flow controls with 700 or more hours' total time in service on the effective date of this AD and that have not been overhauled, comply with paragraph (e) within the next 100 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 800 hours' time in service from the last inspection.

  (b) For fuel flow controls with less than 700 hours' total time in service on the effective date of this AD and that have not been overhauled, comply with paragraph (e) before the accumulation of 800 hours' total time in service, and thereafter at intervals not to exceed 800 hours' time in service from the last inspection.

  (c) For fuel flow controls that have been overhauled and that on the effective date of this AD, have 700 or more hours' time in service since overhaul, comply with paragraph (e) within the next 100 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 800 hours' time in service from the last inspection.

  (d) For fuel flow controls that have been overhauled and that on the effective date of this AD have less than 700 hours' time in service since overhaul, comply with paragraph (e) before the accumulation of 800 hours' time in service since overhaul, and thereafter at intervals not to exceed 800 hours' time in service from the last inspection.

  (e) Inspect the input drive assembly, in accordance with Rolls-Royce Service Bulletin Number SP 73- A109 dated February 2, 1967, or later ARB-approved issue, or FAA-approved equivalent. If wear is found, incorporate Rolls-Royce Modification 3258, or an FAA-approved equivalent, before further flight.

  (f) The repetitive inspection required by paragraphs (a) through (d) may be discontinued upon incorporation of Modification 3258, or an FAA-approved equivalent.

This amendment effective August 25, 1967.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E2EU](https://openairdocs.org/tcds/E2EU): Rolls-Royce Deutschland Ltd & Co KG; names 1 of 11 models: Spey 506-14

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1 (0 by airframe model, 1 by engine model)
- Makers: Gulfstream Aerospace 1

Models with the most aircraft:

- [Rolls-Royce SPEY-506-14](https://openairdocs.org/engine/rolls-royce-spey-506-14): 1 aircraft (engine model)

All 1 models: https://openairdocs.org/ad/67-22-08/models.md
Every aircraft: https://openairdocs.org/ad/67-22-08/aircraft.md

Its text cites no advisory circulars or STCs.

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