AD 93-02-07

AD Final Rules - DRS_93-02-07.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
93-02-07
Document Type:
AD Final Rules
Docket Number:
92-ASW-39
Subject Heading:
Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., (BHTI) Model 412 Helicopters
Subject:
Vertical Fin Spar
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/22/1993
Make:
Bell Helicopter Textron, Inc.
Model:
412
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Superseded AD: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Superseded By: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: 93-02-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   92-ASW-39

AMENDMENT:   39-8489

AD NUMBER:   93-02-07

SUBJECT HEADING:   Airworthiness Directives; BELL HELICOPTER TEXTRON, INC., (BHTI) Model 412 Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective March 22, 1993.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
93-02-07 BELL HELICOPTER TEXTRON, INC., (BHTI): Amendment 39-8489. Docket Number 92-ASW-39. Supersedes AD 85-17-03R1, Amendment 39-5194, Docket Number 85- ASW-37.

Applicability: BHTI Model 412 helicopters, serial numbers 33001 through 33120 and serial numbers 34001 through 34012, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent failure of the vertical fin spar cap assembly, which could result in loss of the vertical fin and subsequent loss of control of the helicopter, accomplish the following:

(a) Within 25 hours time in service after the effective date of this AD, inspect the vertical fin spar cap assembly, P/N 212-030-447-001, in accordance with the Accomplishment Instructions, Part I, of BHTI Alert Service Bulletin (ASB) No. 412-92-65, dated August 17, 1992, and every 25 hours time in service thereafter until it is replaced with a vertical fin spar cap assembly, P/N 212-030-447-101, in accordance with the Accomplishment Instructions, Part II, of the ASB. If any cracks, corrosion or doubler debonding is found, replace the spar cap assembly before further flight with an airworthy part in accordance with the Accomplishment Instructions, Part II, of the ASB.

(b) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Rotorcraft Certification Office, ASW-170, 4400 Blue Mound Road, Fort Worth, Texas 76106. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Rotorcraft Certification Office.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Manager, Rotorcraft Certification Office.

(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the helicopter to a location where the requirements of this AD can be accomplished.

(d) The inspection and replacement of the fin spar cap shall be done in accordance with the Accomplishment Instructions, Parts I and II, of BHTI ASB No. 412-92-65, dated August 17, 1992. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Bell Helicopter Textron, Inc., P.O. Box 482, Fort Worth, Texas 76101-0482. Copies may be inspected at the FAA, Office of the Assistant Chief Counsel, 4400 Blue Mound Road, Bldg. 3B, Room 158, Fort Worth, Texas; or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC.

(e) This amendment becomes effective on March 22, 1993.

FOOTER: