AD 90-21-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L-1 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L-3 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
Unsafe Condition
Loss of a tip weight, failure of the tail rotor blade assembly, loss of the tail rotor hub assembly, and subsequent loss of control of the helicopter.
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Required Actions
Inspect the aircraft to determine the part number and serial number of the installed tail rotor blade assembly. Remove and replace the assembly with an airworthy blade assembly if it has P/N 206-016-201-125 or -127 with a listed serial number.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
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Affected Aircraft
Bell Helicopter Textron Canada Limited Models 206A, 206A-1, 206B, 206B-1, 206L, 206L-1, and 206L-3 helicopters with tail rotor blade assembly P/N 206-016-201-125 or -127.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Tail Rotor Blade Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_90-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-21-03 Document Type: AD Final Rules Docket Number: 90-ASW-44 Subject Heading: Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, ...Show more Subject: Tail Rotor Blade Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/14/1991 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-1 | 206L | 206L-1 | 206L-3 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: 90-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-ASW-44 AMENDMENT: 39-7072 AD NUMBER: 90-21-03 SUBJECT HEADING: Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters ACTION: SUMMARY: DATES: Effective August 14, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-21-03 BELL HELICOPTER TEXTRON, INC. (BHTI): Amendment 39-7072. Docket No. 90-ASW-44. Final Rule of Priority Letter AD 90-21-03. Applicability: All BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 helicopters, certificated in any category, with tail rotor blade assembly, P/N 206-016-201-125 or - 127. Compliance: Required before further flight, unless already accomplished. To prevent the loss of a tip weight, failure of the tail rotor blade assembly, loss of the tail rotor hub assembly and subsequent loss of control of the helicopter, accomplish the following: (a) Before further flight, inspect the aircraft to determine the part number and serial number of the installed tail rotor blade assembly. If P/N 206-016-201-125 or -127 with a serial number listed below is installed on the helicopter, remove and replace the assembly with an airworthy blade assembly. For 206-016-201-127 T/R BLADE CS-0203 CS-0206 CS-0238 CS-0985 CS-1141 CS-1153 CS- 1207 CS-1210 CS-1219 CS-1229 CS-1232 CS-1235 CS-1252 CS- 1304 CS-1306 CS-1316 CS-1325 CS-1332 CS-1337 CS-1342 CS- 1351 CS-1354 CS-1359 CS-1360 CS-1368 CS-1373 CS-1375 CS- 1380 CS-1391 CS-1461 CS-1466 CS-1476 CS-1489 CS-1519 CS- 1523 CS-1524 CS-1525 CS-1528 CS-1533 CS-1544 CS-1553 CS- 1555 CS-1556 CS-1557 CS-1559 CS-1563 CS-1564 CS-1566 CS- 1577 CS-1579 CS-1580 CS-1584 CS-1585 CS-1588 CS-1594 CS- 1597 CS-1599 CS-1612 CS-1614 CS-1635 CS-1642 CS-1647 CS-1656 CS-1670 CS-1673 CS-1685 CS-1705 CS-1716 CS-1726 CS- 1733 CS-1734 CS-1737 CS-1740 CS-1744 CS-1745 CS-1754 CS- 1756 CS-1760 CS-1771 CS-1778 CS-1784 CS-1827 CS-1830 CS- 1842 CS-1844 CS-1855 CS-1856 CS-1881 CS-1890 CS-1893 CS- 1894 CS-1900 CS-1901 CS-1907 CS-1909 CS-1913 CS-1914 CS- 1940 CS-1944 CS-1953 CS-1957 CS-1958 CS-1958 CS-1959 CS- 1961 CS-1978 CS-1979 CS-1981 CS-1982 CS-1983 CS-1985 CS- 1986 CS-1989 CS-1994 CS-1997 CS-1998 CS-2000 CS-2003 CS- 2007 CS-2016 CS-2019 CS-2027 CS-2033 CS-2037 CS-2088 T-47310 T-47361 T-47371 T-47378 T-47397 T-47398 T- 47401 T-47426 T-47458 For 206-016-201-125 T/R BLADE CS-136 CS-158 CS-398 CS-534 CS-625 CS-658 CS- 684 CS-685 CS-688 CS-690 CS-711 CS-715 CS-716 CS- 719 CS-720 CS-738 CS-740 CS-752 CS-807 CS-832 CS- 865 CS-871 CS-874 T-61995 (b) An alternate method of compliance which provides an equivalent level of safety, may be used if approved by the Manager, Rotorcraft Certification Office, Southwest Region, Federal Aviation Administration, Fort Worth, Texas 76193-0170, telephone (817) 624-5170. This amendment (39-7072, AD 90-21-03) becomes effective on August 14, 1991, as to all persons except those persons to whom it was made immediately effective by Priority Letter AD 90-21-03 issued October 5, 1990, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_90-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-21-03 Document Type: AD Final Rules Docket Number: 90-ASW-44 Subject Heading: Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, ...Show more Subject: Tail Rotor Blade Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/14/1991 Make: Bell Helicopter Textron Canada Limited Model: 206A | 206A-1 (OH-58A) | 206B | 206B-1 | 206L | 206L-1 | 206L-3 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: 90-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-ASW-44 AMENDMENT: 39-7072 AD NUMBER: 90-21-03 SUBJECT HEADING: Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters ACTION: SUMMARY: DATES: Effective August 14, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-21-03 BELL HELICOPTER TEXTRON, INC. (BHTI): Amendment 39-7072. Docket No. 90-ASW-44. Final Rule of Priority Letter AD 90-21-03. Applicability: All BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 helicopters, certificated in any category, with tail rotor blade assembly, P/N 206-016-201-125 or - 127. Compliance: Required before further flight, unless already accomplished. To prevent the loss of a tip weight, failure of the tail rotor blade assembly, loss of the tail rotor hub assembly and subsequent loss of control of the helicopter, accomplish the following: (a) Before further flight, inspect the aircraft to determine the part number and serial number of the installed tail rotor blade assembly. If P/N 206-016-201-125 or -127 with a serial number listed below is installed on the helicopter, remove and replace the assembly with an airworthy blade assembly. For 206-016-201-127 T/R BLADE CS-0203 CS-0206 CS-0238 CS-0985 CS-1141 CS-1153 CS- 1207 CS-1210 CS-1219 CS-1229 CS-1232 CS-1235 CS-1252 CS- 1304 CS-1306 CS-1316 CS-1325 CS-1332 CS-1337 CS-1342 CS- 1351 CS-1354 CS-1359 CS-1360 CS-1368 CS-1373 CS-1375 CS- 1380 CS-1391 CS-1461 CS-1466 CS-1476 CS-1489 CS-1519 CS- 1523 CS-1524 CS-1525 CS-1528 CS-1533 CS-1544 CS-1553 CS- 1555 CS-1556 CS-1557 CS-1559 CS-1563 CS-1564 CS-1566 CS- 1577 CS-1579 CS-1580 CS-1584 CS-1585 CS-1588 CS-1594 CS- 1597 CS-1599 CS-1612 CS-1614 CS-1635 CS-1642 CS-1647 CS-1656 CS-1670 CS-1673 CS-1685 CS-1705 CS-1716 CS-1726 CS- 1733 CS-1734 CS-1737 CS-1740 CS-1744 CS-1745 CS-1754 CS- 1756 CS-1760 CS-1771 CS-1778 CS-1784 CS-1827 CS-1830 CS- 1842 CS-1844 CS-1855 CS-1856 CS-1881 CS-1890 CS-1893 CS- 1894 CS-1900 CS-1901 CS-1907 CS-1909 CS-1913 CS-1914 CS- 1940 CS-1944 CS-1953 CS-1957 CS-1958 CS-1958 CS-1959 CS- 1961 CS-1978 CS-1979 CS-1981 CS-1982 CS-1983 CS-1985 CS- 1986 CS-1989 CS-1994 CS-1997 CS-1998 CS-2000 CS-2003 CS- 2007 CS-2016 CS-2019 CS-2027 CS-2033 CS-2037 CS-2088 T-47310 T-47361 T-47371 T-47378 T-47397 T-47398 T- 47401 T-47426 T-47458 For 206-016-201-125 T/R BLADE CS-136 CS-158 CS-398 CS-534 CS-625 CS-658 CS- 684 CS-685 CS-688 CS-690 CS-711 CS-715 CS-716 CS- 719 CS-720 CS-738 CS-740 CS-752 CS-807 CS-832 CS- 865 CS-871 CS-874 T-61995 (b) An alternate method of compliance which provides an equivalent level of safety, may be used if approved by the Manager, Rotorcraft Certification Office, Southwest Region, Federal Aviation Administration, Fort Worth, Texas 76193-0170, telephone (817) 624-5170. This amendment (39-7072, AD 90-21-03) becomes effective on August 14, 1991, as to all persons except those persons to whom it was made immediately effective by Priority Letter AD 90-21-03 issued October 5, 1990, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
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