[Federal Register Volume 59, Number 187 (Wednesday, September 28, 1994)]
[Unknown Section]
[Page ]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-23815]
[Federal Register: September 28, 1994]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 93-NM-234-AD; Amendment 39-9018; AD 94-18-05]
Airworthiness Directives; Saab Model SF340A and SAAB 340B Series
Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; correction.
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SUMMARY: This document corrects a typographical error that appeared in
the above-captioned airworthiness directive (AD), applicable to certain
Saab Model SF340A and SAAB 340B series airplanes. That AD currently
requires inspections to detect discrepancies of certain main landing
gear (MLG) retract actuator bracket retaining bolts; replacement of
discrepant parts; installation of washers, if necessary; and eventual
replacement of certain MLG retract actuator bracket retaining bolts and
certain nose landing gear (NLG) trunnion pin cross bolts. This action
corrects terms in the compliance time specified for the requirement to
remove the NLG trunnion pin cross bolts. This action is necessary to
ensure that operators are not required to perform actions at a time
that does not correspond with scheduled maintenance.
DATES: Effective October 11, 1994.
The incorporation by reference of certain publications listed in
the regulations was previously approved by the Director of the Federal
Register as of October 11, 1994 (59 FR 46543, September 9, 1994).
ADDRESSES: The service information referenced in this AD may be
obtained from Saab Aircraft AB, Product Support, S581.88, Linkoping,
Sweden. -This information may be examined at the Federal Aviation
Administration (FAA), Transport Airplane Directorate, Rules Docket,
1601 Lind Avenue, SW., Renton, Washington; or at the Office of the
Federal Register, 800 North Capitol Street, NW., suite 700, Washington,
DC.
FOR FURTHER INFORMATION CONTACT: Mark Quam, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (206)
227-2145; fax (206) 227-1320.
SUPPLEMENTARY INFORMATION: On August 24, 1994, the FAA issued AD 94-18-
05, amendment 39-9018 (59 FR 46543, September 9, 1994), to require
inspections to detect discrepancies of certain main landing gear (MLG)
retract actuator bracket retaining bolts; replacement of discrepant
parts; installation of washers, if necessary; and eventual replacement
of certain MLG retract actuator bracket retaining bolts and certain
nose landing gear (NLG) trunnion pin cross bolts. That action was
prompted by reports of extension and retraction problems on the MLG,
due to loose retract actuator brackets on the MLG shock struts. The
actions required by that AD are intended to prevent a loose retract
actuator bracket from interfering with the MLG shock strut trunnion
support, which could result in the inability of the MLG to extend or
retract.
Recently, the FAA has become aware of a typographical error that
appeared in paragraph (c) of the published final airworthiness
directive, which would incorrectly require operators to replace the NLG
trunnion pin cross bolts at a time that may not correspond with
scheduled maintenance for the NLG. The compliance time for paragraph
(c) was incorrectly published as, ``At the next MLG overhaul, or within
12,000 landings after the effective date of this AD, whichever occurs
earlier * * *'' However, the correct compliance time for that
requirement should have referred to ``* * * at the next NLG overhaul.''
Since it is essential that operators perform the replacement in a
timely manner and at a time when the NLG is normally serviced, this
document corrects the compliance terms of paragraph (c) of AD 94-18-05,
amendment 39-9018, to read as follows:
``(c) At the next NLG overhaul, or within 12,000 landings after the
effective date of this AD, whichever occurs earlier, remove the
existing nose landing gear trunnion pin cross bolt, P/N NAS 1305-54D,
and replace it with a new bolt, P/N NAS 1305-50D, in accordance with
Paragraphs C. through F. of the Accomplishment Instructions of Saab
Service Bulletin 340-32-094, dated October 29, 1993, or Revision 1,
dated March 4, 1994.''
The effective date of the rule remains October 11, 1994.
Since no other portion of the regulatory information has been
changed, the final rule is not being republished.
Issued in Renton, Washington, on September 21, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-23815 Filed 9-27-94; 8:45 am]
BILLING CODE 4910-13-U
