AD 66-07-03

final rule
Data completeness: 70%

Airworthiness Directives; THOMAS A. EDISON and GARWIN, INC: Applies to Thomas A. Edison Models 195 and 273 Aircraft Engine Gage Units (Models Manufactured for Military use are Identified as AN 5773-1A or -T1A, AN 5773-2 or -72, MS 28043-1 or -T1, and MS 28043-2 or -T2), P/N's 22-802-03 through -14 and 22-802-022, with Date Stamp Before April 1, 1961

AD Number
66-07-03
Status
final_rule
Effective Date
Product Category
appliance
Docket
Unknown
FR Citation
Federal Register: March 4, 1966

Applicability

TypeManufacturerModelDetails
aircraft Edison, Thomas A., Inc. | Garwin, Inc. Engine Gage Units Airworthiness Directives; THOMAS A. EDISON and GARWIN, INC: Applies to Thomas A. Edison Models 195 and 273 Aircraft Engine Gage Units (Models Manufactured for Military use are Identified as AN 5773-1A or -T1A, AN 5773-2 or -72, MS 28043-1 or -T1, and MS 28043-2 or -T2), P/N's 22-802-03 through -14 and 22-802-022, with Date Stamp Before April 1, 1961

Unsafe Condition

Failure of the fuel pressure diaphragm assembly in the engine gage units, resulting in diaphragm rupture under pressure and causing a serious fire hazard and malfunction of the fuel pressure indicator.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Overhaul gage units manufactured before June 30, 1962, by replacing the diaphragm and capillary tube assembly with P/N 45010- as per T.A. Edison Service Bulletin 05-75AB-1-SB-1 or FAA-approved equivalent. Identify overhauled units with a white paint dot below the nameplate. Vent all gage units overboard via a fuel drain line that prevents fuel discharge near fire hazards or personnel compartments.

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Compliance Time

within the next 300 hours' time in service after the effective date of this AD

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Affected Aircraft

Thomas A. Edison Models 195 and 273 Aircraft Engine Gage Units (Military models: AN 5773-1A/-T1A, AN 5773-2/-72, MS 28043-1/-T1, MS 28043-2/-T2), Garwin, Inc. P/N 22-802-03 through -14 and 22-802-022 with Date Stamp before April 1, 1961

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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