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[FR Doc. E7-2506 Filed 2-15-07; 8:45 am]
45 BW 2007-04
FAA
Aircraft Certification Service
AIRWORTHINESS DIRECTIVE
www.faa.gov/aircraft/safety/alerts/
www.gpoaccess.gov/fr/advanced.html
2007-04-16 Boeing: Amendment 39-14948. Docket No. FAA-2005-20351; Directorate Identifier
2003-NM-269-AD.
Effective Date
(a) This AD becomes effective March 23, 2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to all Boeing Model 767-200, -300, -300F, and -400ER series airplanes,
certificated in any category.
Unsafe Condition
(d) This AD results from reports that certain fuel boost pumps may not have flame arrestors
installed in the pump shaft and reports that the pin that holds the flame arrestor in place can break due
to metal fatigue. We are issuing this AD to prevent the possible migration of a flame from a main
tank fuel boost pump inlet to the vapor space of that fuel tank, and consequent ignition of fuel vapors,
which could result in a fire or explosion.
Compliance
(e) You are responsible for having the actions required by this AD performed within the
compliance times specified, unless the actions have already been done.
Inspection for Presence/Position of Flame Arrestor in Main Tank Fuel Boost Pumps
(f) For airplanes having line numbers (L/Ns) 1 through 914 inclusive, except as provided by
paragraph (h) of this AD: Within 365 days after the effective date of this AD, do a detailed inspection
of each main tank fuel boost pump to determine if the pump shaft flame arrestor is installed, a
measurement of the flame arrestor's position in the pump, and all applicable corrective actions, by
accomplishing all the actions specified in the Accomplishment Instructions of Boeing Alert Service
Bulletin 767-28A0077 (for Model 767-200, -300, and -300F series airplanes) or Boeing Alert Service
Bulletin 767-28A0081 (for Model 767-400ER series airplanes), both Revision 1, both dated July 8,
2004, as applicable. Repeat the measurement of the flame arrestor's position in the pump thereafter at
intervals not to exceed the applicable time specified in paragraph (f)(1) or (f)(2) of this AD, until the
replacement required by paragraph (i) of this AD is accomplished. All applicable corrective actions
must be done before further flight.
2007-04-16 2
46 BW 2007-04
Note 1: Any inspection/measurement of the pumps on the left and right main fuel tanks may be done
separately provided that the actions are done on all pumps within the compliance time specified in
paragraph (f) of this AD.
(1) For airplanes that have accumulated more than 15,000 total flight hours as of the date the
initial actions are done in accordance with paragraph (f) of this AD: Repeat the measurement
thereafter at intervals not to exceed 6,000 flight hours or 24 months, whichever comes first.
(2) For airplanes that have accumulated 15,000 total flight hours or fewer as of the date the initial
actions are done in accordance with paragraph (f) of this AD: Do the measurement specified in
paragraph (f) of this AD within 365 days after the date on which the airplane accumulates 15,000
total flight hours or within 24 months after performing the initial inspection required by paragraph (f)
of this AD, whichever occurs later. Repeat the measurement thereafter at intervals not to exceed
6,000 flight hours or 24 months, whichever comes first.
Note 2: Boeing Alert Service Bulletins 767-28A0077 and 767-28A0081 reference Hamilton
Sundstrand Service Bulletin 5006003-28-2, dated October 25, 2002, as an additional source of
service information for accomplishment of the inspection and corrective actions. Although the
Hamilton Sundstrand service bulletin specifies to return main tank fuel boost pumps with damaged,
broken, or out-of-position flame arrestors to a repair shop, that action is not required by this AD.
Note 3: For the purposes of this AD, a detailed inspection is: “An intensive examination of a
specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is
normally supplemented with a direct source of good lighting at an intensity deemed appropriate.
Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and
elaborate procedures may be required.”
(g) For airplanes having L/Ns 915 and on, except as provided by paragraph (h) of this AD: At the
applicable time specified in paragraph (g)(1) or (g)(2) of this AD, do a detailed inspection of each
main tank fuel boost pump to determine if the pump shaft flame arrestor is installed, a measurement
of the flame arrestor's position in the pump, and all applicable corrective actions, by accomplishing
all the actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 767-
　
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