AD 76-06-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-64A | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-64E | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-64F | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | CH-3E | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | CH-54B | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | HH-3C | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | HH-3E | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | USAF CH-3C | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-61L | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-61N | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-61NM | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S-61R | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
| aircraft | Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air Crane, Inc. | Sikorsky Aircraft Corporation | Siller Helicopters | S62A | Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters |
Unsafe Condition
Flaking chrome plating from the pistons of Model 66WAP200 and Model 66WAN200 hydraulic pumps with specified serial numbers could lead to hydraulic system contamination and failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect filter and filter bowl daily for chrome flakes, replace non-approved pumps within 180 calendar days with FAA approved New York Air Brake Company pumps, and report serial numbers of replaced pumps and helicopter details to the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before the first flight each day and within 180 calendar days after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F helicopters, including military variants CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B, equipped with Model 66WAP200 (serial numbers 1080-1086, 2013, 2015, 2228, 2298, 2670, 2889, DO- prefix except DO-1 to DO-83) and Model 66WAN200 (DO-2110, DO-2117, DO-2163, DO-2165, DO-2222, DO-2227) hydraulic pumps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Hydraulic Pumps
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F He...Show more Subject: Hydraulic Pumps Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/24/1976 Make: Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air C...Show more Model: S-64A | S-64E | S-64F | CH-3E | CH-54B | HH-3C | HH-3E | USAF CH-3C | S-61L | S-61N | S-61NM | S-61R...Show more Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-06-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2541 AD NUMBER: 76-06-01 SUBJECT HEADING: Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters ACTION: SUMMARY: DATES: Effective March 24, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-06-01 SIKORSKY AIRCRAFT: Amendment 39-2541. Applies to S-61L, S-61N, S- 61NM, S-61R, S-62A, S-64A, S-64E, S-64F helicopters certified in all categories, including Military CH-3C, HH-3C, CH-3E, HH-3E, CH-54B helicopters certificated in all categories and equipped with: 1. Model 66WAP200 hydraulic pumps, Serial Numbers 1080 through 1086, 2013, 2015, 2228, 2298, 2670, 2889, and all Serial Numbers with "DO-" prefix, except FAA approved New York Air Brake Company Serial Numbers DO-1 through DO-83. 2. Model 66WAN200 hydraulic pumps, Serial Numbers DO-2110, DO-2117, DO- 2163, DO-2165, DO-2222, DO-2227. Compliance required as indicated. To detect flaking chrome plating from the pistons of Model 66WAP200 hydraulic pump, Serial Numbers 1080 through 1086, 2013, 2015, 2228, 2298, 2670, 2889, and all Serial Numbers with "DO-" prefix, except FAA approved New York Air Brake Company Serial Numbers DO-1 through DO-83; and Model 66WAN200 hydraulic pump, Serial Numbers DO-2110, DO-2117, DO-2163, DO-2165, DO-2222, DO-2227, accomplish the following: a. Before the first flight each day, inspect the filter and filter bowl on the primary, auxiliary, and utility hydraulic manifold for the presence of chrome plating flakes, in accordance with the applicable Maintenance Manual instructions. If flakes are found, remove all pumps, with serial numbers noted above, and replace with FAA approved pumps before further flight. Immediately after replacement of the pump, flush and inspect the hydraulic system in accordance with the applicable Maintenance Manual instructions. NOTE: For the requirements regarding the listing of compliance with this AD in the helicopter's permanent maintenance record, see FAR 91.173. b. Within the next 180 calendar days after the effective date of this AD, replace all pumps, with serial numbers noted above, with FAA approved New York Air Brake Company pumps. c. Advise the FAA, Chief, Engineering and Manufacturing Branch, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, of the serial numbers of unapproved pumps found, the registration and serial number of the helicopter on which they are installed, and the serial nubmers of the replacement pumps. (Reporting approved by the Office of Management and Budget under OMB No. 04-R0174.) d. After complying with Paragraph (b) of this AD, the inspection required by Paragraph (a) may be discontinued. This amendment becomes effective March 24, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F He...Show more Subject: Hydraulic Pumps Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/24/1976 Make: Erickson Air-Crane | Glacier Helicopter, Inc. | Helicopter Transport Services, Inc. | Robinson Air C...Show more Model: S-64A | S-64E | S-64F | CH-3E | CH-54B | HH-3C | HH-3E | USAF CH-3C | S-61L | S-61N | S-61NM | S-61R...Show more Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-06-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2541 AD NUMBER: 76-06-01 SUBJECT HEADING: Airworthiness Directives; Sikorsky Models S-61L, S-61N, S-61NM, S-61R, S-62A, S-64A, S-64E, S-64F Helicopters, Including Military CH-3C, HH-3C, CH-3E, HH-3E, and CH-54B Helicopters ACTION: SUMMARY: DATES: Effective March 24, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-06-01 SIKORSKY AIRCRAFT: Amendment 39-2541. Applies to S-61L, S-61N, S- 61NM, S-61R, S-62A, S-64A, S-64E, S-64F helicopters certified in all categories, including Military CH-3C, HH-3C, CH-3E, HH-3E, CH-54B helicopters certificated in all categories and equipped with: 1. Model 66WAP200 hydraulic pumps, Serial Numbers 1080 through 1086, 2013, 2015, 2228, 2298, 2670, 2889, and all Serial Numbers with "DO-" prefix, except FAA approved New York Air Brake Company Serial Numbers DO-1 through DO-83. 2. Model 66WAN200 hydraulic pumps, Serial Numbers DO-2110, DO-2117, DO- 2163, DO-2165, DO-2222, DO-2227. Compliance required as indicated. To detect flaking chrome plating from the pistons of Model 66WAP200 hydraulic pump, Serial Numbers 1080 through 1086, 2013, 2015, 2228, 2298, 2670, 2889, and all Serial Numbers with "DO-" prefix, except FAA approved New York Air Brake Company Serial Numbers DO-1 through DO-83; and Model 66WAN200 hydraulic pump, Serial Numbers DO-2110, DO-2117, DO-2163, DO-2165, DO-2222, DO-2227, accomplish the following: a. Before the first flight each day, inspect the filter and filter bowl on the primary, auxiliary, and utility hydraulic manifold for the presence of chrome plating flakes, in accordance with the applicable Maintenance Manual instructions. If flakes are found, remove all pumps, with serial numbers noted above, and replace with FAA approved pumps before further flight. Immediately after replacement of the pump, flush and inspect the hydraulic system in accordance with the applicable Maintenance Manual instructions. NOTE: For the requirements regarding the listing of compliance with this AD in the helicopter's permanent maintenance record, see FAR 91.173. b. Within the next 180 calendar days after the effective date of this AD, replace all pumps, with serial numbers noted above, with FAA approved New York Air Brake Company pumps. c. Advise the FAA, Chief, Engineering and Manufacturing Branch, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, of the serial numbers of unapproved pumps found, the registration and serial number of the helicopter on which they are installed, and the serial nubmers of the replacement pumps. (Reporting approved by the Office of Management and Budget under OMB No. 04-R0174.) d. After complying with Paragraph (b) of this AD, the inspection required by Paragraph (a) may be discontinued. This amendment becomes effective March 24, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.