Airworthiness Directive · Amendment 39-18045 · Time limits
Pilatus Aircraft Limited Airplanes
Superseded. A later AD replaced this one: AD 2021-11-08. Comply with the one in force.
This AD applies to Pilatus Aircraft Limited Models PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, and PC-6/C1-H2 airplanes, all manufacturer serial numbers (MSN), including MSN 2001 through 2092 (see Note 1 of paragraph c), certificated in any category.
Note 1 of paragraph (c): For MSN 2001-2092, these airplanes are also identified as Fairchild Republic Company PC-6 airplanes, Fairchild Industries PC-6 airplanes, Fairchild Heli Porter PC-6 airplanes, or Fairchild-Hiller Corporation PC-6 airplanes.
We are superseding an airworthiness directive (AD) 2013-11-08 for Pilatus Aircraft Limited Models PC-6, PC-6-H1, PC-6-H2, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC- 6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, and PC-6/C1-H2 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a need to incorporate new revisions into the aircraft maintenance manual or in the limitations document of the FAA-approved maintenance program. We are issuing this AD to require actions to address the unsafe condition on these products.
(1) Actions retained from AD 2013-11-08, Amendment 39-17468 (78 FR 37701; June 24, 2013) for all airplanes in the Applicability section of this AD: If the flap actuator has accumulated 3,500 hours time-in-service (TIS) or more since new or last overhauled or 7 years or more since new or last overhauled, whichever occurs first, replacement of the flap actuator (except part numbers 978.73.14.101 and 978.73.14.103) is required within 350 hours TIS after July 29, 2013, (the effective date retained from AD 2013-11-08) or 6 months after July 29, 2013, (the effective date retained from AD 2013-11-08), whichever occurs first. Flap actuators with less than 3,500 hours TIS or 7 years since new or last overhauled are covered by the airworthiness limitations document (ALS) requirement.
(2) Actions new to this AD for all affected Models PC-6/B2-H2 and PC-6/B2-H4 airplanes: Before further flight after January 16, 2015 (the effective date of this AD) incorporate the maintenance requirements as specified in Section 04-00-00, Airworthiness Limitations, of Chapter 04, Airworthiness Limitations, of the Pilatus PC-6 Maintenance Manual, document number 01975, Revision 19, dated May 31, 2014, into your FAA-accepted maintenance program (maintenance manual).
(3) Actions new to this AD for all airplanes in the Applicability section of this AD except for the Models PC-6/B2-H2 and PC-6/B2-H4 airplanes: Before further flight after January 16, 2015 (the effective date of this AD) incorporate the maintenance requirements as specified in Pilatus ALS, document number 02334, Revision 4, dated May 31, 2014, into your FAA-accepted maintenance program (maintenance manual).
(4) Actions new to this AD for all airplanes in the Applicability section of this AD:
(i) For airplanes with Halon Fire Extinguishers that have not yet reached the 10 year life limit after January 16, 2015 (the effective date of this AD), when the Halon Fire Extinguisher reaches its life limit of 10 years, before further flight, replace with an airworthy Halon Fire Extinguisher following Section 04-00-00, Airworthiness Limitations, of Chapter 04, Airworthiness Limitations, of the Pilatus PC-6 Maintenance Manual, document number 01975, Revision 19, dated May 31, 2014; or Pilatus ALS document number 02334, Revision 4, dated May 31, 2014; as applicable.
(ii) For airplanes with Halon Fire Extinguishers that have reached the 10 year life limit on or before January 16, 2015 (the effective date of this AD), within the next 6 months after January 16, 2015 (the effective date of this AD), replace with an airworthy Halon Fire Extinguisher following Section 04-00-00, Airworthiness Limitations, of Chapter 04, Airworthiness Limitations, of the Pilatus PC-6 Maintenance Manual, document number 01975, Revision 19, dated May 31, 2014; or Pilatus ALS document number 02334, Revision 4, dated May 31, 2014; as applicable.
(iii) Repetitively, after replacing the airplanes Halon Fire Extinguisher as required in paragraphs (f)(4)(i) or (f)(4)(ii), within 10 years after each last replacement, replace with an airworthy Halon Fire Extinguisher.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
