# AD 81-20-02: Vent Tube Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Augustair 2150A
- Effective: March 15, 1982
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4341
- Registered aircraft: 105 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A0A2C1F91C0C11F8862569AF00767F79.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-20-02

## The airworthiness directive

81-20-02 VARGA AIRCRAFT CORPORATION (MORRISEY): Amendment 39- 4341. Applies to Model 2150A, certified in any category.

COMPLIANCE: Required as indicated, unless already accomplished.

To prevent engine fuel starvation due to obstruction of the fuel vent system, prior to further flight, accomplish the following:

a. Inspect vent tube assemblies, P/N 26016-42 and -66, for free airflow between all branches of the vent tubes.

b. Replace obstructed vent tube assemblies with a serviceable part of the same part number prior to return to service.

c. Special flight permits may be issued in accordance with FAR 21.197 to operate aircraft to a base for the accomplishment of inspections required by this AD.

d. Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Western Aircraft Certification Field Office, Northwest Mountain Region, Federal Aviation Administration, 15000 Aviation Boulevard, Hawthorne, California 90261; telephone (213) 536-6352.

Varga Service Bulletin SB-13, entitled Fuel Vent Drain Inspection, refers to the subject matter of this AD.

This amendment becomes effective March 15, 1982, to all persons except those to whom it was made immediately effective by priority mail as Emergency AD 81-20-02, dated September 28, 1981.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A19](https://openairdocs.org/tcds/4A19): Augustair Inc.; names 1 of 3 models: 2150A

## 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: 105 (105 by airframe model, 0 by engine model)
- Makers: Varga 86, Morrisey 18, Morrisey-Shinn 1

Models with the most aircraft:

- [Varga 2150A](https://openairdocs.org/model/varga-2150a): 86 aircraft (airframe model)
- [Morrisey 2150A](https://openairdocs.org/model/morrisey-2150a): 18 aircraft (airframe model)
- [Morrisey-Shinn 2150-A](https://openairdocs.org/model/morrisey-shinn-2150-a): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/81-20-02/models.md
Every aircraft: https://openairdocs.org/ad/81-20-02/aircraft.md

Its text cites no advisory circulars or STCs.

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