| AD Number | 89-25-01 | Status | Active |
| Effective Date | December 26, 1989 | Issue Date | Not specified |
| Docket Number | 89-ASW-33 | Amendment | 39-6401 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Sikorsky Aircraft Corporation |
| Model(s) | S-58A S-58B S-58BT S-58C S-58D S-58DT S-58E S-58ET S-58F S-58FT S-58G S-58H S-58HT S-58J S-58JT |
89-25-01 SIKORSKY AIRCRAFT: Amendment 39-6401. Docket No. 89-ASW-33.
Applicability: Model S-58 series helicopters equipped with reciprocating engines, certificated in any category except restricted.
Compliance: Required within the next 10 hours' time in service after the effective date of this AD, unless already accomplished.
To prevent or reduce the hazards of an in-flight fire which could result in loss of the helicopter, accomplish the following:
(a) Inspect the helicopter for the installation of an approved engine compartment fire extinguishing system.
(b) If an approved engine fire extinguishing system is installed, no further action is necessary.
(c) If an approved engine fire extinguishing system is not installed, accomplish the following:
(1) Prior to further flight, install a placard, decal, or markings, in full view of and legible to the pilot in daylight which states "Engine Fire Extinguishing System Not Installed."
(2) Prior to further flight, revise the helicopter's FAA-approved Rotorcraft Flight Manual (RFM) Operating Limitations Section by attaching or placing in front of the RFM a durable card or paper which contains the following limitations:
(i) "No passengers allowed, except required crew and passengers necessary to accomplish a work program when carried on the flights to and from the work site."
(ii) "Prior to the first flight of the day, test and determine that the fire detector system is properly functioning in accordance with the normal procedure section of the RFM."
NOTE: An engine fire detector system is part of the approved type design and is required by the certification basis. Installation and proper operation are necessary for a determination of airworthiness in accordance with FAR Section 91.29.
(3) Prior to November 30, 1990, install an approved engine compartment fire extinguishing system in accordance with technical data approved by the Administrator. When the fire extinguishing system has been installed, the placard, etc., required by paragraph (c)(1) and the RFM limitations required by paragraph (c)(2) may be removed.
(d) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.
(e) An alternate method of compliance or adjustment of the compliance times, which provides an equivalent level of safety, may be used if approved by the Manager, Boston Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, 12 New England Executive Park, Burlington, Massachusetts 01803.
NOTE: An operator's request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Boston Aircraft Certification Office.
This amendment (39-6401, AD 89-25-01) becomes effective on December 26, 1989.