AD 93-19-08

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AD Number:
93-19-08
Document Type:
AD Final Rules
Docket Number:
93-NM-13-AD
Subject Heading:
Airworthiness Directives; AEROSPATIALE Model ATR42-200 and -300 Series Airplanes
Subject:
Main Landing Gear Inspection
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/22/1993
Make:
ATR - GIE Avions de Transport R gional
Model:
ATR42-200 | ATR42-300 | ATR42-320
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 93-19-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   93-NM-13-AD

AMENDMENT:   39-8707

AD NUMBER:   93-19-08

SUBJECT HEADING:   Airworthiness Directives; AEROSPATIALE Model ATR42-200 and -300 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective December 22, 1993.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
93-19-08 AEROSPATIALE: Amendment 39-8707. Docket 93-NM-13-AD. Supersedes AD 91-08-10, Amendment 39-6953.

Applicability: Model ATR42-200 and -300 series airplanes on which Modification 03226 (as described in Aerospatiale Service Bulletin ATR42-32-0040, dated February 24, 1992, and Revision 1, dated January 18, 1993) has not been accomplished; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

NOTE 1: Paragraphs (a), (a)(1), and (a)(2) of this AD restate the initial and repetitive inspection requirements of AD 91-08-10, Amendment 39-6953, paragraphs A., A.1., and A.2. As allowed by the phrase, "unless accomplished previously," if the initial and repetitive inspections required by AD 91-08-10 have been accomplished previously, paragraphs (a), (a)(1), and (a)(2) of this AD do not require that those inspections be repeated.

To prevent inadvertent retraction of the main landing gear (MLG), accomplish the following:

(a) Perform an ultrasonic inspection of the MLG side brace lower arm in accordance with Aerospatiale Service Bulletin ATR42-32-0036, Revision 1, dated February 15, 1991, and Messier-Bugatti Service Bulletin 631-32-070, Revision 1, dated February 12, 1991, at the thresholds given in paragraphs (a)(1) and (a)(2) of this AD. Repeat the ultrasonic inspections thereafter at intervals not to exceed 1,000 landings until the inspection required by paragraph (b) of this AD is accomplished.

(1) For airplanes that have accumulated 6,000 or more total landings on either the left or right MLG side brace lower arms as of May 6, 1991 (the effective date of AD 91- 08-10, Amendment 39-6953): Perform the initial inspection prior to the accumulation of 8,000 total landings on either the left or right MLG side brace lower arms, or within 14 days after May 6, 1991 (the effective date of AD 91-08-10, Amendment 39-6953), whichever occurs later.

(2) For airplanes that have accumulated less than 6,000 total landings on either the left or right MLG side brace lower arms as of May 6, 1991 (the effective date of AD 91- 08-10, Amendment 39-6953): Perform the initial inspection prior to the accumulation of 6,000 total landings on either the left or right MLG side brace lower arms, or within 90 days after May 6, 1991 (the effective date of AD 91-08-10, Amendment 39-6953), whichever occurs later.

(b) For those airplanes that previously have accomplished the ultrasonic inspections in accordance with paragraph (a) of this AD: Within 1,000 landings after the last inspection required by paragraph (a) of this AD, or within 90 days after the effective date of this AD, whichever occurs later, perform the ultrasonic inspection procedure in accordance with Aerospatiale Service Bulletin ATR42-32-0036, Revision 3, dated December 12, 1991. Repeat this inspection thereafter at intervals not to exceed 1,000 landings. Accomplishment of the requirements of this paragraph constitutes terminating action for the repetitive ultrasonic inspections in accordance with Revision 1 of that service bulletin required by paragraph (a) of this AD.

(c) For those airplanes that have not previously accomplished the ultrasonic inspections in accordance with paragraph (a) of this AD: Prior to the accumulation of 6,000 total landings on either the left or right MLG side brace lower arms, or within 90 days after the effective date of this AD, whichever occurs later, perform an ultrasonic inspection of the MLG side brace lower arm in accordance with Aerospatiale Service Bulletin ATR42-32-0036, Revision 3, dated December 12, 1991. Repeat this inspection thereafter at intervals not to exceed 1,000 landings.

(d) If any ultrasonic inspection result exceeds the acceptance criteria specified in Aerospatiale Service Bulletin ATR42-32-0036, Revision 1, dated February 15, 1991, or Revision 3, dated December 12, 1991, prior to further flight, replace the discrepant MLG side brace lower arm with a new or serviceable part, in accordance with either service bulletin. Following replacement of discrepant parts, continue to repeat the ultrasonic inspection procedure in accordance with Aerospatiale Service Bulletin ATR42-32-0036, Revision 3, dated December 12, 1991, at intervals not to exceed 1,000 landings.

(e) Prior to the accumulation of 15,000 total landings, or within 12 months after the effective date of this AD, whichever occurs later, install Modification 03226, in accordance with Aerospatiale Service Bulletin ATR42-32-0040, dated February 24, 1992, or Revision 1, dated January 18, 1993. Installation of Modification 03226 constitutes terminating action for the repetitive ultrasonic inspections of the MLG side brace lower arm required by this AD.

(f) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch, ANM-113.

NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

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

(h) The actions shall be done in accordance with Aerospatiale Service Bulletin ATR42-32-0036, Revision 1, dated February 15, 1991; Aerospatiale Service Bulletin ATR42-32-0036, Revision 3, dated December 12, 1991; Aerospatiale Service Bulletin ATR42-32-0040, dated February 24, 1992; Aerospatiale Service Bulletin ATR42-32-0040, Revision 1, dated January 18, 1993; and Messier-Bugatti Service Bulletin 631-32-070, Revision 1, dated February 12, 1991. The incorporation by reference of Aerospatiale Service Bulletin ATR42-32-0036, Revision 1, dated February 15, 1991, and Messier-Bugatti Service Bulletin 631-32-070, Revision 1, dated February 12, 1991, was approved previously by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51 as of May 6, 1991 (56 FR 14462, April 10, 1991). The incorporation by reference of the remainder of the service documents listed above is 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 Aerospatiale, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, France. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(i) This amendment becomes effective on December 22, 1993.

FOOTER: