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Airworthiness Directive

AD 98-12-01 63 FR 30370 Superseded

Federal Aviation Administration · 14 CFR part 39

Requires modifying the fuel system to improve the venting between the collector tank, the main wing tanks, and the engine.

Superseded by AD 2006-13-12Federal Register (opens in a new tab)

FR document
98-14607
Amendment
39-10558
Published
1998-06-04
Effective
1998-07-13
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/98-12-01 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

98-12-01

FR doc 98-14607 · 63 FR 30370

AD 98-12-01Published 1998-06-04Effective 1998-07-13

Superseded by 2006-13-12

Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires modifying the fuel system to improve the venting between the collector tank, the main wing tanks, and the engine.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Models PC-6, PC-6/A, PC-6/B, and PC-6/C series airplanes equipped with turbo-prop engines. This AD requires modifying the fuel system to improve the venting between the collector tank, the main wing tanks, and the engine. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by this AD are intended to prevent engine fuel starvation during maximum climb and descent caused by poor fuel tank venting with low fuel levels, which could result in a loss of engine power during critical phases of flight.

More directives for Pilatus PC-6 Porter

  1. AD 2021-24-22 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2022-01-25
  2. AD 2021-11-08 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2021-07-12
  3. AD 2020-16-02 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2020-09-09
  4. AD 2020-11-06 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2020-06-30
  5. AD 2019-10-07 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2019-07-10

All Pilatus PC-6 Porter directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 98-12-01 (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index