Airworthiness Directive · Amendment 39-15606 · Boeing Model 777-200, -200LR, -300, and -300ER Series Airplanes Approved for Extended-Range Twin-Engine Operational Performance Standards (ETOPS)
Boeing Model 777-200, -200LR, -300, and -300ER Series Airplanes Approved for Extended-Range Twin-Engine Operational Performance Standards (ETOPS)
This AD applies to Boeing Model 777-200, -200LR, -300, and -300ER series airplanes, certificated in any category; approved for extended-range twin-engine operational performance standards (ETOPS).
We are adopting a new airworthiness directive (AD) for certain Boeing Model 777-200, -200LR, -300, and -300ER series airplanes. This AD requires a one-time inspection to determine the part number of the cargo compartment fire suppression filter/regulator. This AD also requires, for certain airplanes, a revision of the "Maximum Diversion Time in Minutes" for ETOPS operation specified in the Operations Specifications. For certain airplanes, this AD also provides for optional replacement of the cargo compartment fire suppression filter/ regulator, which would allow revision of the "Maximum Diversion Time in Minutes" for ETOPS operation specified in the Operations Specifications to restore the airplane's full ETOPS capability. This AD results from a report that the filter/regulator installed in the cargo fire suppression system did not meter the Halon for the certified duration during ETOPS flight tests. We are issuing this AD to prevent ETOPS operation with insufficient cargo fire suppression capability, which could result in an uncontained fire in the cargo compartment.
Comply with this AD within the compliance times specified, unless already done.
Within 30 days after the effective date of this AD, inspect the filter/regulator for the fire suppression system in the lower cargo compartment to determine whether a Kidde Aerospace filter/regulator having a part number identified in Table 1 of this AD is installed. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the filter/regulator can be conclusively determined from that review.
| Model | Filter/Regulator Part No. |
|---|---|
| (1) 777-200 and -200LR series airplanes | 473494-1, -2, or -3; or 473995-1, -2, or -3. |
| (2) 777-300 and 777-300ER series airplanes | 473857-1, -2, or -3. |
Except as provided in paragraph (i) of this AD, if a Kidde Aerospace cargo compartment fire suppression filter/regulator identified in Table 1 of this AD is found installed during the inspection or records check required by paragraph (f) of this AD: Before further flight after doing the inspection or records check required by paragraph (f) of this AD, revise the “Maximum Diversion Time In Minutes,” specified in the FAA-approved Operations Specifications, Document D086, in accordance with the applicable instructions contained in Boeing Model 777 ETOPS Configuration, Maintenance, and Procedures, Document D044W054, Revision K, dated June 12, 2008.
For Model 777-200, -300, and -300ER series airplanes: Once the cargo compartment fire suppression filter/regulator has been replaced with a new or serviceable filter/regulator in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-26-0044, dated April 24, 2008; or Revision 1, dated June 19, 2008; the “Maximum Diversion Time In Minutes,” specified in the FAA-approved Operations Specifications, Document D086, may be revised in accordance with the applicable instructions contained in Boeing Model 777 ETOPS Configuration, Maintenance, and Procedures, Document D044W054, Revision K, dated June 12, 2008, to restore the airplane's full ETOPS capability.
(i) The revision to the Operations Specifications specified in paragraph (g) of this AD is not required if, before further flight after a Kidde Aerospace cargo compartment fire suppression filter/regulator identified in Table 1 of this AD is found installed on any airplane, the filter/regulator replacement described in paragraph (h) of this AD is accomplished.
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.
