Airworthiness Directive · Amendment 39-18271 · Fuel
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 787-8 airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787-8 airplanes. This AD was prompted by reports of a potential latent failure of the fuel shutoff valve actuator circuitry, which was not identified during actuator development. This AD requires replacing certain engine and auxiliary power unit (APU) fuel shutoff valve actuators with new actuators, and also requires revising the maintenance or inspection program to include a new airworthiness limitation into the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness (ICA). We are issuing this AD to detect and correct latent failures of the fuel shutoff valve to the engine and auxiliary power unit (APU), which could result in the inability to shut off fuel to the engine and APU and, in case of certain fires, an uncontrollable fire that could lead to structural failure.
Within 30 days after the effective date of this AD, revise the maintenance or inspection program, as applicable, to add Airworthiness Limitation (AWL) Number 28-AWL-ACT, “Engine and APU Fuel Shutoff Valve (Fuel Spar Valve) Actuator Test,” by incorporating the information specified in figure 1 to paragraph (g) of this AD into the Airworthiness Limitations Section of the Instructions for Continued Airworthiness. This may be accomplished by inserting a copy of Airworthiness Limitation Number 28-AWL-ACT, “Engine and APU Fuel Shutoff Valve (Fuel Spar Valve) Actuator Test,” into the maintenance or inspection program, as applicable. For the airplanes identified in the applicability note of Airworthiness Limitation Number 28-AWL-ACT, “Engine and APU Fuel Shutoff Valve (Fuel Spar Valve) Actuator Test,” the initial compliance time for accomplishing the actions specified in figure 1 to paragraph (g) of this AD is within 10 days after accomplishment of the maintenance or inspection program revision, as applicable, required by this paragraph. When the engine and APU fuel shutoff valve actuators have been replaced as required by paragraph (i) of this AD, the Airworthiness Limitation Number 28-AWL-ACT, “Engine and APU Fuel Shutoff Valve (Fuel Spar Valve) Actuator Test,” required by this paragraph may be removed from the maintenance or inspection program, as applicable.
| AWL No. | Task | Interval | Applicability | Description |
|---|---|---|---|---|
| 28-AWL-ACT | ALI | 10 DAYS | ALL | Engine and APU Fuel Shutoff Valve (Fuel Spar Valve) Actuator Test |
| INTERVAL NOTE: Not required on days when the airplane is not operated. The test must be done before further flight if it has been 10 or more calendar days since the last inspection | APPLICABILITY NOTE: This AWL applies to airplanes with Eaton Aerospace Ltd. fuel spar valve actuators having part number 53-0037 installed at the engine or APU fuel shutoff valve location | Concern: The fuel spar valve actuator design can result in airplanes operating with a failed fuel spar valve actuator that is not reported. A latently failed fuel spar valve actuator would prevent fuel shutoff to an engine or APU. In the event of certain engine or APU fires, the potential exists for an engine or APU fire to be uncontrollable. Perform the following tests in accordance with Boeing Service Bulletin B787-81205-SB280015-00, Issue 002, dated June 19, 2014. | ||
| 1. Do PART 1: ENGINE FUEL SPAR VALVE ACTUATOR TEST as described in Boeing Service Bulletin B787-81205-SB280015-00, Issue 002, dated June 19, 2014. | ||||
| a. If the left engine fuel spar valve actuator has part number 53-0037, perform the left engine fuel spar valve actuator test. | ||||
| b. If the right engine fuel spar valve actuator has part number 53-0037, perform the right engine fuel spar valve actuator test. | ||||
| c. If either test fails, repair faults as required (refer to Boeing Airplane Maintenance Manual 28-22-02). | ||||
| 2. Do PART 2: APU FUEL SPAR VALVE ACTUATOR TEST as described in Boeing Service Bulletin B787-81205-SB280015-00, Issue 002, dated June 19, 2014. | ||||
| a. If the APU fuel spar valve actuator has part number 53-0037, perform the APU fuel spar valve actuator test. | ||||
| b. If the test fails, before further flight requiring APU availability, repair faults as required (refer to Boeing Airplane Maintenance Manual 28-25-03). | ||||
| NOTE: Dispatch may be permitted per MMEL 28-25-03 if the APU is not required for flight. |
Except as specified in paragraph (i) of this AD: After accomplishment of the maintenance or inspection program revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
Within 36 months after the effective date of this AD, replace the engine and APU fuel shutoff valve actuators having part number (P/N) 53-0037 with P/N 53-0049, in accordance with Part 5 or Part 6, as applicable, of the Accomplishment Instructions of Boeing Service Bulletin B787-81205-SB280015-00, Issue 002, dated June 19, 2014. When all the engine and APU fuel shutoff valve actuators have been replaced as required by this paragraph, Airworthiness Limitation Number 28-AWL-ACT, “Engine and APU Spar Valve Actuator Test,” required by paragraph (g) of this AD may be removed from the maintenance or inspection program, as applicable.
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
