# AD 83-08-03: Hydraulic Pressure Line

- Type: Airworthiness directive
- Status: Current
- Products: Learjet 35 and 36
- Effective: May 3, 1983
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-4635
- Registered aircraft: 30 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/97DF1D41DF2AEF2A8625698800760389.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/83-08-03

## The airworthiness directive

83-08-03 GATES LEARJET: Amendment 39-4635. Applies to Model 35, Serial Numbers 001 through 495 and Model 36, Serial Numbers 001 through 052, certificated in all categories. Compliance required as indicated unless already accomplished.

1. To assure that no interference exists between right hand engine hydraulic pressure line and wire bundle, comply with Gates Learjet Alert Service Bulletin SB 35/36-29-1, dated February 21, 1983, within the next thirty (30) flight hours.

2. Alternative means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region.

3. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

This amendment becomes effective May 3, 1983

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A10CE](https://openairdocs.org/tcds/A10CE): Learjet Inc.; names 2 of 29 models: 35, 36

## 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: 30 (30 by airframe model, 0 by engine model)
- Makers: Gates Lear Jet 29, Learjet 1

Models with the most aircraft:

- [Gates Lear Jet 35](https://openairdocs.org/model/gates-lear-jet-35): 16 aircraft (airframe model)
- [Gates Lear Jet 36](https://openairdocs.org/model/gates-lear-jet-36): 13 aircraft (airframe model)
- [Learjet 35](https://openairdocs.org/model/learjet-35): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/83-08-03/models.md
Every aircraft: https://openairdocs.org/ad/83-08-03/aircraft.md

Its text cites no advisory circulars or STCs.

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