AD 93-22-10

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AD Number:
93-22-10
Document Type:
AD Final Rules
Docket Number:
93-NM-17-AD
Subject Heading:
Airworthiness Directives; AEROSPATIALE Model ATR42 and ATR72 Series Airplanes
Subject:
Aileron Control System
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 | ATR42-500 | ATR72-101 | ATR72-102 | ATR72-201 | ATR72-202 | ATR7...Show more
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Superseded AD: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Superseded By: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: 93-22-10
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   93-NM-17-AD

AMENDMENT:   39-8734

AD NUMBER:   93-22-10

SUBJECT HEADING:   Airworthiness Directives; AEROSPATIALE Model ATR42 and ATR72 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective December 22, 1993.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
93-22-10 AEROSPATIALE: Amendment 39-8734. Docket 93-NM-17-AD. Supersedes AD 90-26-52, Amendment 39-6880, which superseded Telegraphic AD T90-24-51, issued on November 16, 1990.

Applicability: All Model ATR42 and ATR72 series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

NOTE 1: Paragraph (b) of this AD restates the requirement for repetitive inspections contained in paragraph b. of AD 90-26-52. The first inspection required by this AD must be performed within the specified repetitive inspection interval after the last inspection performed in accordance with paragraph b. of AD 90-26-52.

NOTE 2: Paragraphs (a), (c), and (d) of this AD restate the requirements of paragraphs a., c., and d. of AD 90-26-52. As allowed by the phrase, "unless accomplished previously," if the requirements of paragraphs a., c., and d. of AD 90-26-52 have been accomplished previously, this AD does not require that they be repeated.

To prevent severely reduced controllability of the airplane, accomplish the following:

(a) Within 48 hours after February 19, 1991 (the effective date of AD 90-26-52, Amendment 39-6880), accomplish the following:

(1) Add the following to the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) and notify all crew members. This may be accomplished by inserting a copy of this AD in the AFM.

"Use of roll trim in excess of plus or minus one unit (one dot) with the autopilot engaged is prohibited except for an engine failure condition."

(2) Install a warning placard in the cockpit in full view of the pilot and co-pilot, which states:

"WARNING - DO NOT EXCEED PLUS OR MINUS ONE UNIT (ONE DOT) OF ROLL TRIM WITH THE AUTOPILOT ENGAGED EXCEPT FOR AN ENGINE FAILURE CONDITION."

(b) Prior to the accumulation of 1,000 total hours time-in-service on the airplane, or within 50 hours time-in-service after February 19, 1991 (the effective date of AD 90-26-52, Amendment 39-6880), whichever occurs later, and thereafter at intervals not to exceed 1,000 hours time-in-service, accomplish the following:

(1) Open all inspection plates in the wing which provide access to the aileron control system; perform a detailed inspection of the aileron control system in accordance with the manufacturer's Maintenance Manual and verify that there is freedom of movement without binding; and, for the Model ATR42, verify, in accordance with Aerospatiale Service Bulletin ATR42-27- 0022, Revision 1, dated April 14, 1988, that there is no free play in excess of tolerances specified in the service bulletin.

(2) Perform a detailed visual inspection of all bearings of the aileron control system located in the wings for proper operation and the absence of physical defects.

(3) If any discrepancy is found, prior to further flight, repair or replace any defective part with a serviceable part, or otherwise correct the discrepancy, in accordance with the manufacturer's Maintenance Manual.

(c) For airplanes on which the rudder and/or elevator tab rods have been replaced in accordance with Aerospatiale Service Bulletin ATR42-27-0046, dated June 11, 1990, or ATR42-27-0049, dated September 14, 1990 (for Model ATR42 series airplanes); or Aerospatiale Service Bulletin ATR72-27-1008, dated June 11, 1990, or ATR72-27-1012, dated October 29, 1990 (for Model ATR72 series airplanes); accomplish the following:

(1) If either of the conditions specified in paragraph (c)(1)(i) or (c)(1)(ii) of this AD apply, within 15 days after February 19, 1991 (the effective date of AD 90-26-52, Amendment 39-6880), perform a flight check in accordance with Paragraph C. of Aerospatiale Service Bulletin ATR42-27-0050 (for Model ATR42 series airplanes) or ATR72-27-1013 (for Model ATR72 series airplanes), both dated November 22, 1990. The flight check must not be performed during commercial flight.

(i) If, as a result of the flight check required by telegraphic AD T90-24-51 (issued November 16, 1990), the trim settings were determined to be outside the acceptable values specified in the telegraphic AD; or

(ii) If that flight check has not been accomplished as of February 19, 1991 (the effective date of AD 90-26-52, Amendment 39-6880).

(2) If one or more of the trim indications are out of tolerance, prior to further flight, repair in accordance with a method approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

(3) If the flight check required by paragraph C. of telegraphic AD T90-24-51 has been performed, and the trim settings were within the acceptable values specified in that telegraphic AD, no further action is required by this paragraph.

(d) For airplanes on which the rudder tab rods have been replaced in accordance with Aerospatiale Service Bulletin ATR42-27-0046, dated June 11, 1990, or ATR42-27-0049, dated September 14, 1990 (for Model ATR42 series airplanes); or replaced in accordance with Aerospatiale Service Bulletin ATR72-27-1008, dated June 11, 1990, or ATR72-27-1012, dated October 29, 1990 (for Model ATR72 series airplanes); accomplish the following:

(1) Within 7 days after February 19, 1991 (the effective date of AD 90-26- 52, Amendment 39-6880), perform a ground inspection to detect incorrect rudder and trim tab settings, in accordance with Aerospatiale Service Bulletins ATR42-27-0051 (for Model ATR42 series airplanes) or AT72-27-1014 (for Model ATR72 series airplanes), both dated November 22, 1990.

(2) If any discrepancy is found, prior to further flight, repair or replace the defective part in accordance with the applicable service bulletin.

(e) Within 24 months after the effective date of this AD, accomplish the following:

(1) Replace the automatic flight control system (AFCS) computer with a new AFCS computer in accordance with Aerospatiale Service Bulletin ATR42-22-0015, Revision 1, dated March 6, 1992, or Revision 2, dated July 29, 1993 (for Model ATR42 series airplanes); or Aerospatiale Service Bulletin ATR72-22-1004, Revision 1, dated March 6, 1992 (for Model ATR72 series airplanes); and

(2) Modify the wiring in accordance with Aerospatiale Service Bulletin ATR42-27-0058, Revision 1, dated February 27, 1992, or Revision 2, dated July 5, 1993 (for Model ATR42 series airplanes); or Aerospatiale Service Bulletin ATR72-27-1019, Revision 1, dated March 20, 1992 (for Model ATR72 series airplanes).

(f) Following accomplishment of the replacement of the AFCS computer and the modification of the wiring, required by paragraph (e) of this AD, the changes to the flight manual and the placard required by paragraph (a) of this AD may be removed.

(g) 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 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

(h) 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.

(i) The verification, flight check, ground inspection, replacement, and modification shall be accomplished in accordance with the following applicable Aerospatiale service bulletins, which contain the indicated list of effective pages:

Service Bulletin
and Issue Date	Page
Number	Revision Level
Indicated on Page	Date Indicated
on Page
ATR42-27-0022,
Revision 1,
April 14, 1988	1

2-13	1

(Original)	April 14, 1988

January 12, 1988
ATR42-27-0050,
November 22, 1990	1-5	(Original)	November 22, 1990
ATR72-27-1013,
November 22, 1990	1-5	(Original)	November 22, 1990
ATR42-27-0051,
November 22, 1990	1-6	(Original)	November 22, 1990
AT72-27-1014,
November 22, 1990	1-6	(Original)	November 22, 1990
ATR42-22-0015,
Revision 1,
March 6, 1992	1-4

5-9	1

(Original)	March 6, 1992

October 10, 1991
ATR42-22-0015,
Revision 2,
July 29, 1993	1-3

4

5-9	2

1

(Original)	July 29, 1993

March 6, 1992

October 10, 1991
ATR72-22-1004,
Revision 1,
March 6, 1992	1-2

3-8	1

(Original)	March 6, 1992

October 10, 1991
ATR42-27-0058,
Revision 1,
February 27, 1992	1-5, 14,
16-20, 39-42,
49-56, 60

6-13, 15,
21-38, 43-48,
57-59	1



(Original)	February 27, 1992



November 4, 1991
ATR42-27-0058,
Revision 2,
July 5, 1993	1, 3, 7, 11-12,
34-35, 37-42,
49-50,

2, 4-5, 14,
16-20, 51-56, 60

6, 8-10, 13,
15, 21-33, 36,
43-48, 57-59	2



1


(Original)	July 5, 1993



February 27, 1992


November 4, 1991
ATR72-27-1019,
Revision 1,
March 20, 1992	1-4, 6, 11-14,
23-29

5, 7-10, 15-22	1


(Original)	March 20, 1992


November 4, 1991

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 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.

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

FOOTER: