# SAIB ACE-98-26: 

- Type: Special airworthiness information bulletin (advisory, not mandatory)
- Status: Current
- Revision: 0
- Issued: April 23, 1998
- Products: Augustair 2150, 2150A and 2180
- Product type: Aircraft, Small Airplane
- PDF: https://openairdocs.org/files/sha256/f4/71/f471073201edd59c1701e52d566fa5edd465f81fb311484448324017b62a575e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/03A7AF32B0A7D3D18625721F0052EC6A.0001
- Page: https://openairdocs.org/saib/ACE-98-26

## Text

**SPECIAL**

**AIRWORTHINESS**

**INFORMATION**

**BULLETIN**

**AIRCRAFT CERTIFICATION SERVICE 800 INDEPENDENCE AVENUE, S.W.**

**WASHINGTON, DC 20591**

U.S. Department of Transportation Federal Aviation Administration

No. ACE-98-26 April 23, 1998

Published by: FAA, AFS-610, P.O. Box 26460, Oklahoma City, OK 73125 This is issued for informational purposes only and any recommendation for corrective action is not mandatory.

Introduction The purpose of this Special Airworthiness In formation Bulletin (SAIB) is to advise owners/operators of Augustair, Inc. (for merly Varga, Shinn, Morrisey, and Montanair) models 2150, 2150A and 2180 of a possible fuel mism anagement situation. This information is valuable to anyone who operates one of the above lis ted airplanes because of the possibility of fuel exhaustion especially when conducting maximum range /endurance flight. The SAIB is advisory in nature and not mandated by regulation.

Background This SAIB is prompted by reports of near total fu el exhaustion. This situation can occur when the airplane is flown after having been parked on a sloping ramp with one wing lower than the other and both fuel valves in the “on” position.

The fuel will drain from the hi gh wing to the low wing and may begin to siphon overboard when the fuel reaches the level of the vent outlet. Fuel can reach the level of the vent outlet during refueling if the tank is filled to a point above the vent outlet or the airplane is refueled when the fuel is cool and the fuel expands to the vent outlet as the fuel temperature rises with the outside temperature. Fuel siphoning, once begun, will continue until the fuel is drained below the level of the vent outlet, fuel pressure in the tank builds up too much to allow venting, the aircraft is moved to a level surface or at least one of the fuel valves is closed and a tank cap is loosened to relieve the pressure. Fuel loss may range from a fraction of a gallon to several gallons, depending on the circumstances. In addition to the loss of fuel, this condition presents a fire hazard.

Recommendation The FAA is recommending, but not requiring the following:

a. Operators should ensure that a thorough prefli ght inspection is conducted prior to flight, including a physical verification of the fuel quantity. This alone will alleviate the possibility of operating the airplane with an insufficient/unknown fuel quantity.

b. Ensure that both fuel valves are in the correct position (off/on) prior to takeoff.

c. Ensure that both fuel valves are placed in the “off” position when the airplane is parked.

This will prevent the initiation of fuel siphoning even on a sloping ramp.

These measures are common sense but some operators are either unaware or are not utilizing them.

For Further Information Contact:

**2 ACE-98-26**

Jerry Robinette, Aerospace Engineer, FAA, Atlant a Aircraft Certification Office, 1895 Phoenix Boulevard, One Crown Center, Suite 450, Atla nta, Georgia 30349; telephone: (770) 703-6096;

facsimile: (770) 703-6097.

## Registered aircraft it may concern (OpenAirDocs)

Registry models matched by make and model, the same way as ADs, most registered aircraft first.

- [Varga 2150A](https://openairdocs.org/model/varga-2150a): 86 registered aircraft (airframe model)
- [Morrisey 2150A](https://openairdocs.org/model/morrisey-2150a): 18 registered aircraft (airframe model)
- [Varga 2180](https://openairdocs.org/model/varga-2180): 12 registered aircraft (airframe model)
- [Morrisey 2150](https://openairdocs.org/model/morrisey-2150): 4 registered aircraft (airframe model)
- [Montanair SPIRIT 2180](https://openairdocs.org/model/montanair-spirit-2180): 2 registered aircraft (airframe model)
- [Morrisey-Shinn 2150-A](https://openairdocs.org/model/morrisey-shinn-2150-a): 1 registered aircraft (airframe model)
- [Varga 2150](https://openairdocs.org/model/varga-2150): 0 registered aircraft (airframe model)

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