# AD 69-20-03: Fuel Temperature Indicator

- Type: Airworthiness directive
- Status: Current
- Products: Gulfstream Aerospace G-159
- Effective: January 23, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-924
- Registered aircraft: 5 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7649A841AEA1A5D686256E0C00672E7E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/69-20-03

## The airworthiness directive

69-20-03 GRUMMAN: Amdt. 39-848, as amended by Amdt. 39-924, applies to all G-159 aircraft.

Compliance required within the next 50 hours' time in service after the effective date of this airworthiness directive as amended. To prevent fuel filter blockage due to ice and possible engine flameout, accomplish the following or an equivalent approved by the Chief, Engineering and Manufacturing Branch, Southern Region.

  (a) Install a fuel temperature indicator on each engine fuel system in accordance with Grumman Gulfstream Service Change 114, with Amendment 1 or later approved revision.

  (b) Mark gage with red radial lines at +5 degrees C and +54 degrees C and a green arc from +5 degrees C to +54 degrees C.

  (c) Install a placard adjacent to fuel temperature indicator which reads as follows: "Caution See AFM for use of fuel filter heater."

The use of a fuel additive as outlined in Advisory Circular 20-29A along with an appropriate Airplane Flight Manual supplement or Revision 21 to the G-159 Airplane Flight Manual is considered an equivalent means for showing compliance with paragraphs (a), (b), and (c).

Amendment 39-848 effective October 5, 1969.

This amendment (39-924) becomes effective January 23, 1970.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A17](https://openairdocs.org/tcds/1A17): Gulfstream Aerospace Corporation; names 1 of 1 models: G-159

## 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: 5 (5 by airframe model, 0 by engine model)
- Makers: Grumman 4, Grumman American Avn. 1

Models with the most aircraft:

- [Grumman G-159](https://openairdocs.org/model/grumman-g-159): 4 aircraft (airframe model)
- [Grumman American Avn. G-159](https://openairdocs.org/model/grumman-american-avn-g-159): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/69-20-03/models.md
Every aircraft: https://openairdocs.org/ad/69-20-03/aircraft.md

## Related documents

- [AC 20-29C](https://openairdocs.org/ac/20-29): Approval and Use of Fuel System Icing Inhibitors (FSII). Cited as AC 20-29A in the AD's requirements

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