AIRWORTHINESS DIRECTIVE
CAA-AD-042/2001
Date of issue:
May 23, 2001
AIRCRAFT - MAIN DECK CARGO DOORS -
INSPECTION/REPLACEMENT
Applicability: Model 737-200 and -300 series airplanes equipped with
main deck cargo doors installed in accordance with supplemental type
certificate (STC) SA2969SO, certificated in any category.
Effective date: July 12, 2001
Compliance: Required as indicated in FAA AD 2001-09-15.
Remarks: The compliance of
this AD must be recorded in Aircraft Logbook, where applicable the requirements
of this AD must be integrated into Aircraft Technical Documentation. Address
inquiries concerning this AD to: Civil Aviation Authority, Airworthiness
Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel: 420 2 33320922,
fax: 420 2 20562270.
Ing. Pavel MATOUŠEK
Director of
Airworthiness Division
CAA CZ
2001-09-15 BOEING:
Amendment 39-12222. Docket 99-NM-85-AD. Supersedes AD 95-01-06 R1,
Amendment 39-9449.
Applicability: Model 737-200 and -300 series airplanes
equipped with main deck cargo doors installed in accordance with supplemental
type certificate (STC) SA2969SO, certificated in any category.
NOTE 1: This AD applies to each airplane identified in
the preceding applicability provision, regardless of whether it has been
modified, altered, or repaired in the area subject to the requirements of this
AD. For airplanes that have been modified, altered, or repaired so that the
performance of the requirements of this AD is affected, the owner/operator must
request approval for an alternative method of compliance in accordance with
paragraph (c)(1) of this AD. The request should include an assessment of the
effect of the modification, alteration, or repair on the unsafe condition
addressed by this AD; and, if the unsafe condition has not been eliminated, the
request should include specific proposed actions to address it.
Compliance: Required as indicated, unless accomplished
previously.
To prevent in-flight separation of the main deck cargo
door from the airplane, accomplish the following:
NOTE 2: This AD references Pemco Alert Service Letter
737-53-0003, Revision 3, dated December 22, 1994; Pemco Service
Bulletin 737-53-0003, Revision 4, dated February 22, 1995; and Pemco
Service Bulletin 737-53-0003, Revision 5, dated March 25, 1999; for
information concerning inspection and replacement procedures. In addition, this
AD specifies replacement requirements different from those included in the
service letter or service bulletin. Where there are differences between the AD
and the service letter or service bulletin, the AD prevails.
RESTATEMENT OF REQUIREMENTS AD 95-01-06 R1:
Repetitive Inspections
(a) Within 50 flight cycles after January 24,
1995 (the effective date of AD 95-01-06, amendment 39-9117), or within 50
flight cycles after installation of STC SA2969SO, whichever occurs later,
perform a detailed visual inspection to detect cracking in the radii on the
support angles on the lower jamb of the main deck cargo door, in accordance
with Pemco Alert Service Letter 737-53-0003, Revision 3, dated
December 22, 1994.
(1) If no cracking is detected, repeat the detailed
visual inspection thereafter at intervals not to exceed 450 flight cycles.
(2) If any cracking is detected, prior to further
flight, replace the cracked part with a new part in accordance with the alert
service letter. Repeat the detailed visual inspection thereafter at intervals
not to exceed 450 flight cycles.
NOTE 3: For the purposes of this AD, a detailed visual
inspection is defined as: "An intensive visual examination of a specific
structural area, system, installation, or assembly to detect damage, failure,
or
irregularity. Available lighting is normally
supplemented with a direct source of good lighting at intensity deemed
appropriate by the inspector. Inspection aids such as mirror, magnifying
lenses, etc., may be used. Surface cleaning and elaborate access procedures may
be required."
NEW REQUIREMENTS OF THIS AD:
Terminating Action
(b) Within 1,500 flight cycles after the effective
date of this AD, install redesigned lower jamb latch lug support angles in the
main cargo door surround structure in accordance with Pemco Service Bulletin
737-53-0003, Revision 4, dated February 22, 1995, or Revision 5,
dated March 25, 1999. This action constitutes terminating action for the
requirements of this AD.
Alternative Methods of Compliance
(c) (1) 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, Atlanta Aircraft Certification Office (ACO), FAA. Operators shall
submit their requests through an appropriate FAA Principal Maintenance
Inspector, who may add comments and then send it to the Manager, Atlanta ACO.
(2) Alternative methods of compliance, approved
previously in accordance with AD 95-01-06 R1, amendment 39-9449, are
approved as alternative methods of compliance with paragraphs (a) and (b)
of this AD.
NOTE 4: Information concerning the existence of
approved alternative methods of compliance with this AD, if any, may be
obtained from the Atlanta ACO.
Special Flight Permits
(d) Special flight permits may be issued in accordance
with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR
21.197 and 21.199) to operate the airplane to a location where the requirements
of this AD can be accomplished.
Incorporation by Reference
(e) The actions shall be done in accordance with Pemco
Alert Service Letter 737-53-0003, Revision 3, dated December 22,
1994; Pemco Service Bulletin 737-53-0003, Revision 4, dated
February 22, 1995, or Pemco Service Bulletin 737-53-0003, Revision 5,
dated March 25, 1999; as applicable.
(1) The incorporation by reference of Pemco Service
Bulletin 737-53-0003, Revision 4, dated February 22, 1995; and Pemco
Service Bulletin 737-53-0003, Revision 5, dated March 25, 1999; is
approved by the Director of the Federal Register in accordance with
5 U.S.C. 552(a) and 1 CFR part 51.
(2) The incorporation by reference of Pemco Alert
Service Letter 737-53-0003, Revision 3, dated December 22, 1994, was
approved previously by the Director of the Federal Register as of January 24,
1995 (60 FR 2323, January 9, 1995).
(3) Copies may be obtained from Pemco Aeroplex, Inc.,
P.O. Box 2287, Birmingham, Alabama 35201-2287. Copies may be inspected at the
FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington;
or at the FAA, Atlanta ACO, One Crown Center, 1895 Phoenix Boulevard, suite
450, Atlanta, Georgia; or at the Office of the Federal Register, 800 North
Capitol Street, NW., suite 700, Washington, DC.
Effective Date
(f) This amendment becomes effective on June 14, 2001.
FOR FURTHER INFORMATION CONTACT: William Culler,
Airframe and Propulsion Branch, ACE-117A, FAA, Atlanta Aircraft Certification
Office, One Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, Georgia
30337-2748; telephone (770) 703-6084; fax (770) 703-6097.
Issued in Renton, Washington, on May 1, 2001.
Donald L. Riggin, Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.