# AD 77-17-13: Nose Landing Gear Doors

- Type: Airworthiness directive
- Status: Current
- Products: Bombardier CL-215-1A10, CL-215-6B11 (CL-215T Variant) and CL-215-6B11 (CL-415 Variant)
- Effective: August 30, 1977
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3023
- Registered aircraft: 12 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FAD0851CAFA362D862569A700662D30.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/77-17-13

## The airworthiness directive

77-17-13 CANADAIR: Amendment 39-3023. Applies to Canadair Model CL-215 aircraft, S/Ns 1001 through 1030, certificated in all categories.

Compliance required prior to issuance of a U.S. airworthiness certificate, unless already accomplished.

To preclude inadvertent opening of the nose landing gear doors when electric power to the nose gear selector valve is interrupted with the landing gear in the "UP" position, accomplish the following:

  (a) Incorporate the alteration outlined in Canadair Service Bulletin CL-215-176, dated September 5, 1973, or an equivalent alteration.

  (b) Alter the nose landing gear hydraulic system in accordance with the modifications described in Canadair Service Bulletin CL-2l5-200, dated August 5, 1975, or an equivalent method.

  (c) Equivalent alterations or methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

  (d) Upon submission of substantiating data by an owner or operator, through an FAA maintenance inspector, the compliance time specified in this AD may be adjusted by the Chief, Engineering and Manufacturing Branch FAA Eastern Region.

This amendment is effective August 30, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A14EA](https://openairdocs.org/tcds/A14EA): De Havilland Aircraft of Canada Limited; names 2 of 3 models: CL-215-1A10, CL-215-6B11 (CL-215T Variant)

## 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: 12 (12 by airframe model, 0 by engine model)
- Makers: Canadair 8, Bombardier 4

Models with the most aircraft:

- [Canadair CL-215-6B11(CL-215T)](https://openairdocs.org/model/canadair-cl-215-6b11-cl-215t): 6 aircraft (airframe model)
- [Bombardier CL-215-6B11 (CL-415)](https://openairdocs.org/model/bombardier-cl-215-6b11-cl-415): 4 aircraft (airframe model)
- [Canadair CL215 1A10](https://openairdocs.org/model/canadair-cl215-1a10): 2 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/77-17-13/models.md
Every aircraft: https://openairdocs.org/ad/77-17-13/aircraft.md

Its text cites no advisory circulars or STCs.

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