AD 78-24-06 R1

final rule

Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters

AD Number
78-24-06 R1
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Bell Helicopter Textron Canada Limited 206L Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters
aircraft Bell Helicopter Textron Canada Limited 206L-1 Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters

Unsafe Condition

Failure of the horizontal stabilizer, P/N 206-023-119, due to cracks in the stabilizer skin area exposed by the cutouts in the upper stabilizer supports.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Modify left and right upper stabilizer supports (P/N 206-023-100-009 and -010) per Bell Service Bulletin 206L-78-3 or Alert SB 206L-80-16. Visually check stabilizer skin area daily for cracks. Replace horizontal stabilizer before further flight if cracks are found.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Within the next 10 hours' time in service after the effective date of this AD for modification, and before first flight of each day after modification for checks.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Bell Model 206L and 206L-1 helicopters, all serial numbers, with horizontal stabilizer P/N 206-023-119 and upper stabilizer supports P/N 206-023-100-009/-010.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Horizontal Stabilizer

Applicability Source Text

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AD Number:
78-24-06 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters
Subject:
Horizontal Stabilizer
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/11/1981
Make:
Bell Helicopter Textron Canada Limited
Model:
206L | 206L-1
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Superseded AD: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Superseded By: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: 78-24-06 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4032

AD NUMBER:   78-24-06 R1

SUBJECT HEADING:   Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective May 11, 1981.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-24-06 R1 BELL: Amendment 39-3358 as amended by Amendment 39-4032. Applies to Bell Models 206L and 206L-1 helicopters, certificated in all categories (Airworthiness Docket No. 78-ASW-53).

Compliance required as indicated, unless previously accomplished. To prevent possible failure of the horizontal stabilizer, P/N 206-023-119, all dash numbers, accomplish the following:

(a) Within the next 10 hours' time in service after the effective date of this AD, modify the left and right upper stabilizer supports, P/N 206-023-100-009 and -010, respectively, in accordance with Bell Helicopter Textron Service Bulletin 206L-78-3 dated October 23, 1978, or Bell Helicopter Textron Alert Service Bulletin 206L-80-16 dated November 17, 1980, or FAA approved equivalent, so that the critical area can be checked.

(b) Before the first flight of each day after compliance with paragraph (a), visually check the stabilizer skin area exposed by the cutouts, in the upper stabilizer supports, for cracks.

(1) If a crack is found, remove and replace the horizontal stabilizer before further flight.

(2) If no cracks are found, continue the repetitive check specified above.

(c) The checks required by this AD may be performed by the pilot.

NOTE: For the requirements regarding the listing of compliance and method of compliance with this AD in the aircraft's permanent maintenance record, see FAR 91.173.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the Service Manager, Bell Helicopter Textron, P.O. Box 482, Fort Worth, Texas 76101. These documents may also be examined at the Office of the Regional Counsel, Southwest Region, FAA, 4400 Blue Mound Road, Fort Worth, Texas, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Southwest Regional Office in Fort Worth, Texas.

Amendment 39-3358 became effective December 5, 1978.
This amendment 39-4032 becomes effective May 11, 1981.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_78-24-06_R.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
78-24-06 R1
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters
Subject:
Horizontal Stabilizer
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/11/1981
Make:
Bell Helicopter Textron Canada Limited
Model:
206L | 206L-1
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: 78-24-06 R1
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4032

AD NUMBER:   78-24-06 R1

SUBJECT HEADING:   Airworthiness Directives; Bell Model 206L and 206L-1 Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective May 11, 1981.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-24-06 R1 BELL: Amendment 39-3358 as amended by Amendment 39-4032. Applies to Bell Models 206L and 206L-1 helicopters, certificated in all categories (Airworthiness Docket No. 78-ASW-53).

Compliance required as indicated, unless previously accomplished. To prevent possible failure of the horizontal stabilizer, P/N 206-023-119, all dash numbers, accomplish the following:

(a) Within the next 10 hours' time in service after the effective date of this AD, modify the left and right upper stabilizer supports, P/N 206-023-100-009 and -010, respectively, in accordance with Bell Helicopter Textron Service Bulletin 206L-78-3 dated October 23, 1978, or Bell Helicopter Textron Alert Service Bulletin 206L-80-16 dated November 17, 1980, or FAA approved equivalent, so that the critical area can be checked.

(b) Before the first flight of each day after compliance with paragraph (a), visually check the stabilizer skin area exposed by the cutouts, in the upper stabilizer supports, for cracks.

(1) If a crack is found, remove and replace the horizontal stabilizer before further flight.

(2) If no cracks are found, continue the repetitive check specified above.

(c) The checks required by this AD may be performed by the pilot.

NOTE: For the requirements regarding the listing of compliance and method of compliance with this AD in the aircraft's permanent maintenance record, see FAR 91.173.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the Service Manager, Bell Helicopter Textron, P.O. Box 482, Fort Worth, Texas 76101. These documents may also be examined at the Office of the Regional Counsel, Southwest Region, FAA, 4400 Blue Mound Road, Fort Worth, Texas, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Southwest Regional Office in Fort Worth, Texas.

Amendment 39-3358 became effective December 5, 1978.
This amendment 39-4032 becomes effective May 11, 1981.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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