Airworthiness Directive · Amendment 39-16938 · Electrical power
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category, specified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Model 757-200, -200PF, and -200CB series airplanes, as identified in Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009.
(2) Model 757-300 series airplanes, as identified in Boeing Special Attention Service Bulletin 757-24-0106, Revision 5, dated July 30, 2009.
We are superseding an existing airworthiness directive (AD) for certain Model 757-200, -200PF, -200CB, and -300 series airplanes. That AD currently requires inspecting certain power feeder wire bundles for damage, inspecting the support clamps for these wire bundles to determine whether the clamps are properly installed, and performing corrective actions if necessary. This new AD requires additional inspections for certain airplanes. This AD was prompted by a report that a power feeder wire bundle chafed against the number six auxiliary slat track, causing electrical wires in the bundle to arc, which damaged both the auxiliary slat track and power feeder wires. We are issuing this AD to prevent arcing that could be a possible ignition source for leaked flammable fluids, which could result in a fire. Arcing could also result in a loss of power from the generator connected to the power feeder wire bundle, and consequent loss of systems, which could reduce controllability of the airplane.
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 Model 757-200, -200PF, and -200CB series airplanes identified in Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009; and for Model 757-300 series airplanes identified as Group 1 airplanes in Boeing Special Attention Service Bulletin 757-24-0106, Revision 5, dated July 30, 2009: Within 24 months after March 5, 2007 (the effective date for AD 2007-03-01, Amendment 39-14912 (72 FR 3939, January 29, 2007)), perform a general visual inspection for damage (including but not limited to chafing) of power feeder wire bundles W3312 and W3412 at front spar station 148.90 in the left and right wings, and a general visual inspection of the support clamps for those power feeder wire bundles to determine whether the clamps are properly installed, and, before further flight, do all applicable corrective actions. Do these actions by doing all of the applicable actions in accordance with the Accomplishment Instructions of the applicable service bulletin identified in Table 1 of this AD. After the effective date of this AD, only Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009 (for Model 757-200, -200CB, and -200PF series airplanes); or Boeing Special Attention Service Bulletin 757-24-0106, Revision 5, dated July 30, 2009 (for Model 757-300 series airplanes); may be used.
| Model— | Boeing Special Attention Service Bulletin— | Revision— | Dated— |
|---|---|---|---|
| 757-200, -200CB, and -200PF series airplanes | 757-24-0105 | 2 | April 20, 2006. |
| 757-200, -200CB, and -200PF series airplanes | 757-24-0105 | 5 | July 30, 2009. |
| 757-300 series airplanes | 757-24-0106 | 2 | April 20, 2006. |
| 757-300 series airplanes | 757-24-0106 | 5 | July 30, 2009. |
This paragraph provides credit for inspections and corrective actions, as required by paragraph (g) of this AD, if those actions were performed before March 5, 2007 (the effective date for AD 2007-03-01, Amendment 39-14912 (72 FR 3939, January 29, 2007)), using the service information listed in Table 2 of this AD.
| Boeing Special Attention Service Bulletin— | Revision— | Dated— |
|---|---|---|
| 757-24-0105 | September 30, 2004. | |
| 757-24-0105 | 1 | June 23, 2005. |
| 757-24-0106 | September 30, 2004. | |
| 757-24-0106 | 1 | June 23, 2005. |
For Model 757-200, -200CB, and -200PF series airplanes identified as Group 1, Configuration 1 airplanes, in Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009, on which inspections have been done before the effective date of this AD in accordance with any service bulletin specified in Table 3 of this AD: Within 24 months after the effective date of this AD, do a general visual inspection to determine if the clamp is installed on the lower bracket on the left wing, in accordance with Figure 1 of Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009. If the clamp is missing, before further flight, install a clamp on the lower bracket on the left wing, in accordance with Figure 1 of Boeing Special Attention Service Bulletin 757-24-0105, Revision 5, dated July 30, 2009.
| Boeing Special Attention Service Bulletin— | Revision— | Dated— |
|---|---|---|
| 757-24-0105 | September 30, 2004. | |
| 757-24-0105 | 1 | June 23, 2005. |
| 757-24-0105 | 2 | April 20, 2006. |
| 757-24-0105 | 3 | October 3, 2006. |
| 757-24-0105 | 4 | January 4, 2008. |
For Model 757-300 series airplanes in Group 2, as identified in Boeing Special Attention Service Bulletin 757-24-0106, Revision 5, dated July 30, 2009: Within 24 months after the effective date of this AD, perform a general visual inspection for damage (including, but not limited to chafing) of power feeder wire bundles W5784 and W5786 at front spar station 148.90 in the left and right wings, and a general visual inspection of the support clamps for those power feeder wire bundles to determine if the clamps are properly installed, and, before further flight, do all applicable corrective actions. Do all applicable actions in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-24-0106, Revision 5, dated July 30, 2009.
(1) This paragraph provides credit for inspections and corrective actions, as required by paragraph (j) of this AD, if those actions were performed before the effective date of this AD using Boeing Special Attention Service Bulletin 757-24-0106, Revision 4, dated January 4, 2008.
(2) This paragraph provides credit for inspections and corrective actions, as required by paragraph (j) of this AD, if those actions were performed before the effective date of this AD using the service information listed in table 4 of this, provided that power feeder wire bundles W5784 and W5786 were inspected and all applicable correction actions were done.
| Boeing Special Attention Service Bulletin— | Revision— | Dated— |
|---|---|---|
| 757-24-0106 | September 30, 2004. | |
| 757-24-0106 | 1 | June 23, 2005. |
| 757-24-0106 | 2 | April 20, 2006. |
| 757-24-0106 | 3 | October 3, 2006. |
(3) This paragraph provides credit for inspections and corrective actions, as required by paragraph (g) of this AD, if those actions were performed before the effective date of this AD using the service information listed in table 5 of this AD.
| Boeing Special Attention Service Bulletin— | Revision— | Dated— |
|---|---|---|
| 757-24-0105 | 3 | October 3, 2006. |
| 757-24-0105 | 4 | January 4, 2008. |
| 757-24-0106 | 3 | October 3, 2006. |
| 757-24-0106 | 4 | January 4, 2008. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
