[Federal Register Volume 62, Number 34 (Thursday, February 20, 1997)]
[Proposed Rules]
[Pages 7730-7731]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-4144]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 96-ANE-24]
RIN 2120-AA64
Airworthiness Directives; AlliedSignal Inc. and Rajay Inc. Oil
Scavenge Pumps
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: This document proposes the adoption of a new airworthiness
directive (AD) that is applicable to AlliedSignal Inc. oil scavenge
pumps, Part Numbers (P/Ns) 101633-01 and -02 and Rajay Inc. oil
scavenge pumps, P/Ns 1025-1 and -2. This proposal would require initial
and repetitive inspections of the oil scavenge pump for the security of
the snap ring installation, snap ring and washer wear, and shaft groove
wear, and replacement, if necessary, with serviceable parts. This
proposal is prompted by reports of severe wear on the end plate of the
oil scavenge pump. The actions specified by the proposed AD are
intended to prevent oil scavenge pump snap ring failure causing severe
wear on the pump end plate, which could result in loss of engine oil
and subsequent engine shutdown.
DATES: Comments must be received by April 21, 1997.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), New England Region, Office of the Assistant Chief
Counsel, Attention: Rules Docket No. 96-ANE-24, 12 New England
Executive Park, Burlington, MA 01803-5299. Comments may also be sent
via the Internet using the following address: ``engineprop@dot.faa.gov''. Comments sent via the Internet must contain
the docket number in the subject line. Comments may be inspected at
this location between 8:00 a.m. and 4:30 p.m., Monday through Friday,
except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Richard Simonson, Aerospace Engineer,
Seattle Aircraft Certification Office, FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW, Renton, WA 98055-4056; telephone
(206) 227-2597, fax (206) 227-1181.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to participate in the making of the
proposed rule by submitting such written data, views, or arguments as
they may desire. Communications should identify the Rules Docket number
and be submitted in triplicate to the address specified above. All
communications received on or before the closing date for comments,
specified above, will be considered before taking action on the
proposed rule. The proposals contained in this notice may be changed in
light of the comments received.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the proposed rule. All
comments submitted will be available, both before and after the closing
date for comments, in the Rules Docket for examination by interested
persons. A report summarizing each FAA-public contact concerned with
the substance of this proposal will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this notice must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 96-ANE-24.'' The postcard will be date stamped and
returned to the commenter.
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, New England Region, Office of the Assistant Chief Counsel,
Attention: Rules Docket No. 96-ANE-24, 12 New England Executive Park,
Burlington, MA 01803-5299.
Discussion
The Federal Aviation Administration (FAA) has received reports of
severe wear on the pump end plate of AlliedSignal Inc. oil scavenge
pumps, Part Numbers (P/Ns) 101633-01 and -02 and Rajay Inc. oil
scavenge pumps, P/Ns 1025-1 and -2. The investigation revealed that the
pump end plate failure was caused by failure of the snap ring that
locates the pump rotor along the longitudinal axis of the pump. Further
investigation revealed an incident where the pump end plate was worn
completely through, resulting in loss of engine oil and subsequent
engine shutdown. This condition, if not corrected, could result in oil
scavenge pump snap ring failure causing severe wear on the pump end
plate, which could result in loss of engine oil and subsequent engine
shutdown.
Since an unsafe condition has been identified that is likely to
exist or develop on other products of this same type design, the
proposed AD would require initial and repetitive inspections of the oil
scavenge pump for security of the snap ring installation, snap ring and
washer wear, and shaft groove wear, and replacement, if necessary, with
serviceable parts. The FAA has determined that changes in pump design
may warrant future rulemaking.
The FAA estimates that 3,000 pumps installed on aircraft of U.S.
registry would be affected by this proposed AD. The FAA estimates that
it would take approximately 4 work hours per oil scavenge pump to
accomplish the proposed actions, and that the average labor rate is $60
per work hour. Required parts, if the scavenge pump requires
replacement, would cost approximately $1,000 per oil scavenge pump.
Based on these figures, the total cost impact of the proposed AD on
U.S. operators is estimated to be $3,720,000.
The regulations proposed herein would not have substantial direct
effects on the States, on the relationship between the national
government and the States, or on the distribution of power and
responsibilities among the various levels of government. Therefore, in
accordance with Executive Order 12612, it is determined that this
[[Page 7731]]
proposal would not have sufficient federalism implications to warrant
the preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this proposed
regulation (1) is not a ``significant regulatory action'' under
Executive Order 12866; (2) is not a''significant rule'' under the DOT
Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
and (3) if promulgated, will not have a significant economic impact,
positive or negative, on a substantial number of small entities under
the criteria of the Regulatory Flexibility Act. A copy of the draft
regulatory evaluation prepared for this action is contained in the
Rules Docket. A copy of it may be obtained by contacting the Rules
Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration proposes to amend
part 39 of the Federal Aviation Regulations (14 CFR part 39) as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding the following new
airworthiness directive:
Allied Signal Inc. and Rajay Inc.: Docket No. 96-ANE-24.
Applicability: AlliedSignal Inc. oil scavenge pumps, Part
Numbers (P/Ns) 101633-01 and -02 and Rajay oil scavenge pumps, P/Ns
1025-1 or -2, installed on Teledyne Continental Motors IO-470 and
TSIO-520 series, and Textron Lycoming O-360, IO-360, and IO-540
series reciprocating engines. These engines are installed on but not
limited to reciprocating engine powered aircraft manufactured by
Aerostar Aircraft Corporation, Cessna, Curtiss-Wright Corporation
(Travel Air), Helio Enterprises, Inc., The New Piper Aircraft
Corporation, Revo Inc. (Lake), and Twin Commander.
Note 1: This airworthiness directive (AD) applies to each oil
scavenge pump 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 oil scavenge
pumps 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 (d) 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 oil scavenge pump snap ring failure causing severe
wear on the pump end plate, which could result in loss of engine oil
and subsequent engine shutdown, accomplish the following:
(a) Within 25 hours time in service (TIS) after the effective
date of this AD, inspect oil scavenge pumps in accordance with the
following instructions or Aerostar Aircraft Corporation Service
Bulletin (SB) No. SB600-131, dated June 14, 1996.
(1) Remove the oil scavenge pump and inspect for security of the
snap ring installation.
(2) Remove the snap ring and washer between the snap ring and
bearing, and inspect the snap ring and washer for wear, consisting
of thinning or bevelling at the inside diameter. If any wear visible
to the naked eye is detected, replace with a serviceable snap ring
and washer prior to further flight.
(3) Inspect the shaft groove for round wear on the spline side
of the groove. If any wear visible to the naked eye is detected,
replace with a serviceable shaft prior to further flight.
(4) If the snap ring is not in the shaft groove, disassemble the
entire scavenge pump and inspect for internal damage prior to
further flight. If any internal damage is found, replace the oil
scavenge pump with a serviceable oil scavenge pump prior to further
flight.
(b) Thereafter, at each 100-hour and annual inspection, perform
repetitive inspections, and, if necessary, replace with serviceable
parts, in accordance with paragraph (a) of this AD.
(c) Accomplishment of the procedures described in Aerostar
Aircraft Corporation Service Bulletin No. SB600-131, dated June 14,
1996, constitutes an acceptable alternative method of compliance for
the actions required by this AD.
(d) 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, Seattle Aircraft Certification
Office. The request should be forwarded through an appropriate FAA
Maintenance Inspector, who may add comments and then send it to the
Manager, Seattle Aircraft Certification Office.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this airworthiness directive,
if any, may be obtained from the Seattle Aircraft Certification
Office.
(e) 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 aircraft to a location where
the requirements of this AD can be accomplished.
Issued in Burlington, Massachusetts, on February 4, 1997.
James C. Jones,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 97-4144 Filed 2-19-97; 8:45 am]
BILLING CODE 4910-13-U
