{"id":"F2007L03988","name":"AD/B737/301 Amdt 2 - Spoiler Actuator Jamming","slug":"ad-b737-301-amdt-2-spoiler-actuator-jamming","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":160776,"registerId":"commonwealth-F2007L03988-current","compilationNumber":null,"startDate":"2026-04-04","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/301 Amdt 2 | Spoiler Actuator Jamming | 11/2007 |\n| ------------------ | ------------------------ | ------- |\n\n| Applicability: | Model 737-800 series aeroplanes, serial numbers 32685, 34277 through 34281 inclusive, 34474, 34475, 34654 through 34656 inclusive, 34690, 34948, 34949, 35091 through 35093 inclusive, 35103, 35134, 35176 through 35183 inclusive, 35330, 35331, 35558, 35559, and 36323 through 36328 inclusive. |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Visually check the spoilers to determine spoiler position, in accordance with Boeing 737 Flight Crew Operations Manual Bulletin No. TBC-67, dated5 March 2007. If all spoilers are determined to be properly stowed, no further action is necessary in accordance with this Requirement. |\n| | The visual checks may be performed by qualified personnel or flight crew and must be entered into the aircraft records showing compliance with this AD. |\n| | 2. If, during the Requirement 1 visual check, any spoiler is found to be improperly stowed (in the up position with the speedbrake handle in the down position), replace the flight spoiler actuator with a flight spoiler actuator, having part number (P/N) P665A0001-01 or higher dash number, in accordance with a method approved by the Manager, Seattle Aircraft Certification Office (ACO), United States Federal Aviation Administration (FAA). |\n| | The \"Flight Spoiler Actuator Removal” task and the \"Flight Spoiler Actuator Installation” task in Chapter 27-61-51 of the 737/600/700/800/900 Aircraft Maintenance Manual (AMM) are approved methods for the replacement (removal and installation) of the flight spoiler actuator. |\n| | 3. Carry out an operational test of the speedbrake control system in accordance with a method approved by the Manager, Seattle ACO. |\n| | The \"Speedbrake Control System Operational Test” specified in Chapter27-62-00 of the 737/600/700/800/900 AMM is one approved method for the operational test of the speedbrake control system. |\n| | Note 1: The optional installation of flight spoiler actuator, P/N P665A0001-01 or higher dash number, in all eight flight spoiler positions ends the need for the Requirement 1 repetitive visual checks and the Requirement 3 operational checks. |\n\n| | 4. If, during the Requirement 3 operational test, any spoiler panel is found to be fully extended with the speedbrake handle down, or if any spoiler panel is found fully retracted when the speedbrake handle is up, replace the flight spoiler actuator in accordance with the actions specified in Requirement 2. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | 5. The Master Minimum Equipment List Item 27-7, \"Auto Speed Brake System,'' is no longer applicable to Model 737-800 series aeroplanes equipped with an Short Field Performance (SFP) package. |\n| | 6. Flight spoiler actuators, P/N P665A0001-00, may not be installed on any aeroplane as a replacement spare. |\n| | 7. If any spoiler is found to be improperly stowed during any visual check required by this Directive, report the following information electronically to Boeing using the established Boeing Communications System (BCS): |\n| | Aeroplane serial number, jam position, spoiler panel number or wing position of the spoiler that jammed, date of visual check, and flight hours accumulated on the aeroplane. |\n| | 8. Install flight spoiler actuator, P/N P665A0001-01 or higher dash number, in all eight flight spoiler positions in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-27A1283, dated 3 April 2007.Doing this installation ends the requirements detailed in this Directive.Any flight spoiler actuator with P/N P665A0001-01 (or higher dash number) that was previously installed in any flight spoiler position in accordance with the requirements of this AD at amendment 1 is acceptable for meeting the requirements of this AD for that flight spoiler position. |\n| | 9. Do not install a flight spoiler actuator, having P/N P665A0001-00, on any aeroplane. |\n| | Note 2: FAA AD 2007-15-04 Amdt 39-15133 dated 11 July 2007 refers. This AD supersedes FAA AD 2007-06-52. |\n| Compliance: | For Requirement 1 - After every landing and after any rejected takeoff manoeuvre after the effective date of this AD, until installation of flight spoiler actuator, P/N P665A0001-01 or higher dash number, in all eight flight spoiler positions is accomplished. |\n| | For Requirement 2 - Before further flight after the Requirement 1 visual check. |\n\n| | For Requirement 3 - After any maintenance action that operates the spoiler system, until the installation of flight spoiler actuator, P/N P665A0001-01 or higher dash number, in all eight flight spoiler positions is accomplished. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Requirement 4 - Before further flight after the Requirement 3 operational test. |\n| | For Requirement 5 and 6 - As of the effective date of this AD. |\n| | For Requirement 7: |\n| | a. For visual checks accomplished before the effective date of this AD - Within seven days after effective date of this AD. |\n| | b. For visual checks accomplished after the effective date of this AD - Within seven days after carrying out the inspection. |\n| | For Requirement 8 - Within 120 days after the effective date of this AD. |\n| | For Requirement 9 - As of the effective date of this AD. |\n| | This Amendment becomes effective on 25 October 2007. |\n| Background: | The United States federal Aviation Administration (FAA) has received a report of seven flight spoiler actuator jams on Model 737-800 Short Field Performance (SFP) aeroplanes. The cause of the failure has been identified as interference within the actuator main control valve. |\n| | The original issue of this is Directive was issued to detect and correct any spoiler panel that is found in the up position with the speedbrake handle in the down position, which could result in a spoiler actuator hardover and could cause the spoiler surface to jam in the fully extended position. Two or more hardover failures of the spoiler surfaces in the up direction on the same wing, if undetected prior to takeoff, can cause significant roll and consequent loss of control of the aeroplane. |\n| | Amendment 1 was issued following advice from the FAA that the incorrect spoiler actuator part numbers were inadvertently used in AD 2007-06-51 and were corrected in AD 2007-06-52. These part number corrections were incorporated in Amendment 1. |\n| | This amendment introduces a requirement to replace all flight spoilers with those of a higher dash number which is intended to eliminate the possibility of the unsafe condition occurring.The replacement of all flight spoiler actuators provides a terminating action to the requirements of this AD. |\n\n| | The original issue of this AD became effective on 19 March 2007. |\n| --- | ---------------------------------------------------------------- |\n| | Amendment 1 of this Directive became effective on 19 March 2007. |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n10 September 2007","sortOrder":0},{"sectionNumber":"AD/B737/301 Amdt 2","sectionType":"part","heading":"AD/B737/301 Amdt 2","content":"## AD/B737/301 Amdt 2","sortOrder":1},{"sectionNumber":"Spoiler Actuator Jamming","sectionType":"part","heading":"Spoiler Actuator Jamming","content":"## Spoiler Actuator Jamming","sortOrder":2},{"sectionNumber":"11/2007","sectionType":"part","heading":"11/2007","content":"## 11/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original directive (March 2007) was issued as an interim measure requiring repetitive visual inspections to detect jammed spoilers. Amendment 2 significantly expands the scope by introducing a mandatory terminating action — complete replacement of all eight flight spoiler actuators with improved hardware within 120 days. This transforms the AD from an ongoing inspection regime into a hardware modification mandate, effectively closing the safety loop rather than managing risk indefinitely."},"complexity_factors":["Multiple conditional requirements (Requirements 1-9) with interdependencies (e.g., Requirement 4 triggers Requirement 2 actions)","Specific part number tracking (P665A0001-00 vs P665A0001-01) with 'higher dash number' terminology requiring technical aviation knowledge","Dual compliance pathways: repetitive checks until terminating action (full replacement) is completed","Cross-references to external documents (Boeing Flight Crew Operations Manual Bulletin TBC-67, Boeing Alert Service Bulletin 737-27A1283, FAA AD 2007-15-04, 737 AMM Chapter references)","Serial number-specific applicability list (27 specific serial numbers) rather than broad model applicability","Nested compliance timelines varying by requirement (immediate, 7 days, 120 days, 'as of effective date')","Exception for SFP-equipped aircraft regarding Master Minimum Equipment List Item 27-7"],"plain_english_summary":"This AD orders operators of certain Boeing 737-800s (Short Field Performance package) to mitigate a defect that can jam flight spoiler actuators up, risking uncontrollable roll. It requires visual stow checks after each landing/aborted takeoff, replacement of any jammed actuator before flight, operational tests after spoiler maintenance, reporting jams to Boeing, and a full replacement of all eight actuators with the improved P665A0001-01 (or later) within 120 days. The old P665A0001-00 may not be reinstalled."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Yes. The amendment moves beyond inspection and detection to require replacement of all flight spoiler actuators with P/N P665A0001-01 (or higher dash) as a terminating action (Requirement 8; Background). Amendment 1 earlier corrected incorrect part numbers used in the initial AD. The net effect broadens the remedy from repetitive checks to mandatory retrofit and prohibits installation of the older spare (Requirements 6 and 9)."},"complexity_factors":["Narrow, serial-numbered applicability list — only selected 737-800 airframes are affected (Applicability).","Multiple conditional steps: visual check (Requirement 1), conditional actuator replacement (Requirement 2), operational test (Requirement 3), and further replacement triggers (Requirement 4).","Repetitive inspection mandate tied to operations: checks after every landing and after any rejected takeoff until upgrade is complete (Compliance — Requirement 1).","Termination by retrofit: installing P/N P665A0001-01 (or higher dash) in all eight spoiler positions ends repetitive checks (Requirement 8; Note 1).","Parts prohibition and retrofit timing: specific banned spare (P/N P665A0001-00) and 120-day window to complete full installation (Requirements 6, 9; Compliance — Requirement 8).","Reporting obligation to Boeing within seven days when jams are found, including serial number and flight hours (Requirement 7; Compliance).","Approved-method constraints: replacements and tests must follow FAA Manager Seattle ACO-approved methods and referenced Boeing AMM/Service Bulletin tasks (Requirements 2 and 3).","Inter-agency cross-references and supersession: ties to FAA ADs and earlier amendments, including part-number corrections in Amendment 1 (Background; Note 2).","Operational impacts: ‘before further flight’ timing for corrective replacements and tests creates immediate grounding risk until compliance (Compliance — Requirements 2 and 4)."],"plain_english_summary":"This airworthiness directive applies to specific Boeing 737-800 serial numbers and requires visual and operational checks of flight spoilers, replacement of certain spoiler actuators with a higher dash-number part, and reporting of any spoiler jamming. Repetitive inspections are required after every landing and certain maintenance until all eight actuators are upgraded. It matters because actuator interference has caused spoiler panels to jam, which can produce uncommanded roll and risk loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming","history":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming/history","analysis":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming/analysis","conflicts":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming/conflicts","importantCases":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming/important-cases","documents":"/api/acts/ad-b737-301-amdt-2-spoiler-actuator-jamming/documents"}}