Airworthiness Directive · Amendment 39-16718 · Wings
The Boeing Company Model 767 Airplanes
This AD applies to The Boeing Company airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Model 767-200, -300, and -300F series airplanes, as identified in Boeing Service Bulletin 767-57A0094, Revision 2, dated December 17, 2009.
(2) Model 767-400ER series airplanes, as identified in Boeing Service Bulletin 767-57A0095, Revision 2, dated December 17, 2009.
We are superseding an existing airworthiness directive (AD) for the products listed above. That AD currently requires, for certain airplanes, reworking the bonding jumper assemblies on the drain tube assemblies of the slat track housing of the wings. For certain other airplanes, the existing AD requires repetitive inspections of the drain tube assemblies of the slat track housing of the wings to find discrepancies, corrective actions if necessary, and terminating action for the repetitive inspections. This new AD also requires replacing the drain tube assemblies. For certain airplanes, this new AD also requires installing an additional electrostatic bond path for the number 5 and 8 inboard slat track drain tube assemblies. For certain other airplanes, this new AD also requires reworking the bonding jumper assembly. This new AD also revises the applicability to include additional airplanes. This AD was prompted by (1) reports of fuel leaks from certain drain locations of the slat track housing near the engine exhaust nozzle, which could result in a fire when the airplane is stationary, or taxiing at low speed; (2) reports of a bonding jumper assembly of certain drain tubes that did not meet bonding specifications and could result in electrostatic discharge and an in-tank ignition source; and (3) reports of fuel leaks onto the main landing gear (MLG) as a result of a cracked drain tube at the number 5 or 8 slat track housing, which could let fuel drain from the main fuel tanks into the dry bay area of the wings and onto hot MLG brakes and result in a fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For airplanes identified in Boeing Service Bulletin 767-57A0060, Revision 1, dated December 31, 1998: Within 500 flight hours after August 28, 2001 (the effective date of AD 2001-14-19), do a general visual inspection of the drain tube assemblies of the slat track housings of the wings to find discrepancies (loose fittings, cracked tubes, fuel leaks), per Part I of the Accomplishment Instructions of Boeing Service Bulletin 767-57A0060, Revision 1, dated December 31, 1998; or Revision 2, dated January 31, 2002. After the effective date of this AD, only Revision 2 may be used.
(1) If any discrepancies are found, before further flight, rework the drain tube assembly per Part II of the Accomplishment Instructions of Boeing Service Bulletin 767-57A0060, Revision 1, dated December 31, 1998; or Revision 2, dated January 31, 2002. After the effective date of this AD, only Revision 2 may be used. Repeat the inspection at intervals not to exceed 500 flight hours until accomplishment of the requirements in paragraph (h) of this AD.
(2) If no discrepancies are found, repeat the inspection thereafter at intervals not to exceed 500 flight hours, until accomplishment of the requirements in paragraph (h) of this AD.
Note 1: For the purposes of this AD, a general visual inspection is defined as: “A visual examination of an interior or exterior area, installation, or assembly to find obvious damage, failure, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
For airplanes specified in paragraph (g) of this AD: Within 6,000 flight hours or 24 months after August 28, 2001, whichever occurs first, replace the drain tube assemblies of the slat track housings of the wings (including general visual inspection and repair) per Part III of the Accomplishment Instructions of Boeing Service Bulletin 767-57A0060, Revision 1, dated December 31, 1998; or Revision 2, dated January 31, 2002. After the effective date of this AD, only Revision 2 may be used. Any applicable repair must be accomplished prior to further flight. Accomplishment of this paragraph terminates the repetitive inspections required by paragraph (g) of this AD.
(i) For airplanes identified in Boeing Service Bulletin 767-57-0068, dated September 16, 1999: Within 5,000 flight cycles or 22 months after August 28, 2001, whichever occurs first, rework the bonding jumper assembly of the drain tube assemblies of the slat track housing of the wings (including general visual inspection and repair) per the Accomplishment Instructions of Boeing Service Bulletin 767-57-0068, dated September 16, 1999; or Revision 1, dated May 9, 2002. After the effective date of this AD, only Revision 1 may be used. Any applicable repair must be accomplished prior to further flight.
Within 24 months after the effective date of this AD, replace affected drain tube assemblies of the number 5 and number 8 inboard slat track housing, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-57A0094 (for Model 767-200, -300, and -300F series airplanes) or 767-57A0095 (for Model 767-400ER series airplanes), both Revision 2, both dated December 17, 2009; except, in Figure 13 (Sheet 2 of 5) on page 104 and Figure 14 (Sheet 2 of 5) on page 109 of Boeing Service Bulletin 767-57A0094, the view identified as “C” should be identified as “A.”
For airplanes in Groups 1, 2, and 3, as identified in Boeing Service Bulletin 767-57A0094, Revision 2, dated December 17, 2009: The actions specified in paragraphs (k)(1), (k)(2), and (k)(3) of this AD, as applicable, must be done before or concurrently with the requirements of paragraph (j) of this AD.
(1) For Groups 1 and 2: The requirements of paragraph (h) of this AD.
(2) For Group 2 airplanes: Installation of an additional electrostatic bond path for the number 5 and 8 inboard slat track drain tube assemblies, in accordance with Part IV of the Accomplishment Instructions of Boeing Service Bulletin 767-57A0060, Revision 1, dated December 31, 1998; or Revision 2, dated January 31, 2002.
(3) For Group 3 airplanes: The requirements of paragraph (i) of this AD.
(l) For airplanes identified in paragraph (i) of this AD, on which the actions required by paragraph (i) of this AD were done before the effective date of this AD in accordance with Boeing Service Bulletin 767-57-0068, dated September 16, 1999: Prior to or concurrently with the requirements of paragraph (j) of this AD, rework the bonding jumper assembly for the number 5 and 8 inboard slat track housing drain tube installation, in accordance with Part 2 of the Accomplishment Instructions of Boeing Service Bulletin 767-57-0068, Revision 1, dated May 9, 2002.
Actions done before the effective date of this AD in accordance with an applicable service bulletin identified in table 1 of this AD are acceptable for compliance with the corresponding requirements of paragraph (j) of this AD.
| Affected airplanes | Service Bulletin | Revision level | Date |
|---|---|---|---|
| Model 767-200, -300, and -300F series airplanes | Boeing Service Bulletin 767-57A0094 | Original 1 | June 2, 2005. December 19, 2006. |
| Model 767-400ER series airplanes | Boeing Service Bulletin 767-57A0095 | Original 1 | June 2, 2005. December 19, 2006. |
