AD 77-06-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 340A | Airworthiness Directives; CESSNA Model 340A Airplanes |
Unsafe Condition
Fire hazard resulting from oxygen contacting an improper lubricant used in the assembly of the oxygen system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Deactivate the oxygen system by disconnecting the control cable at the oxygen regulator and safety the regulator control in the off position. Install a temporary placard on the instrument panel stating 'OXYGEN INOPERATIVE' and 'DO NOT OPERATE ABOVE 23,500 FEET'. Install a tag on the oxygen filler line assembly prohibiting servicing. Repair and clean the oxygen system within 25 hours' time in service after the AD's effective date using Cessna Service Letter ME77-3 or approved revisions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight and within the next 25 hours' time in service after the effective date of this AD
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Affected Aircraft
Cessna Model 340A airplanes with serial numbers 340A0040 thru 340A0225, 340A0229 and 340A0230
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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