# AD 75-18-01: Rudder Control

- Type: Airworthiness directive
- Status: Current
- Products: Entwicklungsgemeinschaft Sport- und Segelflug Phoebus A1 and Phoebus B1
- Effective: August 18, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Amendment: 39-2318
- Registered aircraft: 11 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DDD6ED8A56FB5BEC86256A38004DEA1C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-18-01

## The airworthiness directive

75-18-01 ENTWICKLUNGSGEMEINSCHAFT (MESSERSCHMITT-BOLKOW-BLOHM GmbH): Amendment 39-2318. Applies to Phoebus A1 and B1 gliders, serial numbers 702 thru 751, certificated in all categories.

Compliance is required as indicated.

To prevent loss of rudder control, accomplish the following:

  (a) Within the next 10 hours' time in service after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection, inspect the rudder control cable lever as follows:

  (1) Remove headrest, luggage container, and seat.

  (2) Disconnect rudder control cables from cable lever.

  (3) Remove rudder control rod and rudder control cable lever (P/N 15120-4236).

  (4) Inspect rudder control cable lever weld for cracks using a magnifying glass with a magnification power of not less than five.

  (5) If a crack is found comply with paragraph (b) of this AD.

  (b) If a rudder control cable lever weld crack is found during an inspection required by paragraph (a), replace the rudder control cable lever P/N 15120-4236 with a serviceable part of the same part number or an FAA-approved equivalent.

(MBB Service Bulletin No. PHOEBUS 27-20/1, dated March 1975, pertains to this AD.)

This amendment becomes effective August 18, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G16EU](https://openairdocs.org/tcds/G16EU): Airbus Defence and Space GmbH; names 2 of 3 models: Phoebus B1, Phoebus A1

## 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: 11 (11 by airframe model, 0 by engine model)
- Makers: Bolkow 8, Waggon-Und Maschinenbau 2, Entwicklungsgemeinschaft 1

Models with the most aircraft:

- [Bolkow PHOEBUS A-1](https://openairdocs.org/model/bolkow-phoebus-a-1): 6 aircraft (airframe model)
- [Bolkow PHOEBUS B-1](https://openairdocs.org/model/bolkow-phoebus-b-1): 2 aircraft (airframe model)
- [Waggon-Und Maschinenbau PHOEBUS B1](https://openairdocs.org/model/waggon-und-maschinenbau-phoebus-b1): 2 aircraft (airframe model)
- [Entwicklungsgemeinschaft PHOEBUS B1](https://openairdocs.org/model/entwicklungsgemeinschaft-phoebus-b1): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/75-18-01/models.md
Every aircraft: https://openairdocs.org/ad/75-18-01/aircraft.md

Its text cites no advisory circulars or STCs.

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