{"id":"F2008L02855","name":"AD/DHC-8/140 Amdt 1 - Elevator Overload Bungee","slug":"ad-dhc-8-140-amdt-1-elevator-overload-bungee","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74731,"registerId":"commonwealth-F2008L02855-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Boeing Canada/De Havilland) ","sectionType":"division","heading":"Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes","content":"### Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\n| AD/DHC-8/140 Amdt 1 | Elevator Overload Bungee | 9/2008 |\n| ------------------- | ------------------------ | ------ |\n\n| Applicability: | Bombardier Inc. Models DHC-8-400, DHC-8-401 and DHC-8-402 Serial Numbers 4003, 4004, 4006 and 4008 through 4159 inclusive. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement: | 1. Carry out the following in accordance with Bombardier Service Bulletin (SB) SB 84-27-30, Revision C, dated 31 October 2007, or later revisions approved by Transport Canada:a. Visually inspect both left and right elevator overload bungees, Part Number (P/N) FE289000000, to determine if they are correctly installed.b. If any bungee is incorrectly installed, remove the bungee and reinstall it correctly before the next flight.c. Attach label, P/N FE289006200, to both left and right elevator overload bungees to show the correct orientation of the outboard end.d. Re-identify the P/N to read “FE289000001” on the identification plate of both the left and right elevator overload bungees.Previous accomplishment of Bombardier Service Bulletin 84-27-27, dated24 May 2005, meets the actions detailed in Requirement 1a and 1b of this AD.Previous accomplishment of Requirements 1a through 1d of this AD in accordance with the original issue (dated 8 February 2007), Revision A (dated2 March 2007) or Revision B (dated 3 May 2007) of Bombardier Service Bulletin 84-27-30, meets the requirements of this AD.Steps detailed in Requirement 1c and 1d of this AD constitutes Modsum4-113537.2. No replacement/spare elevator overload bungees, P/N FE289000000, are permitted to be installed on any aircraft. Only elevator overload bungees identified with new P/N “FE289000001” on the identification plate are permitted to be installed.Note: Transport Canada AD CF-2007-30R1 dated 24 June 2008 refers. |\n\n| Compliance: | For Requirement 1 - Within 5000 flight hours after the effective date of this AD.For Requirement 2 - From the effective date of this AD. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | This Amendment becomes effective on 28 August 2008. |\n| Background: | Several production aircraft have been found with the elevator overload bungees installed in reverse orientation: i.e. larger end outboard rather than inboard. This bungee reversal does not impact normal operation of the elevator and would not increase the probability of an elevator disconnect. However, if a bungee became disconnected at the inboard side, the corresponding side of the elevator may not centre and this could adversely affect the pitch control of the aircraft.This amendment revises the applicability section of the AD and corrects an error in the P/N of the overload bungee in line with the revision of referenced Transport Canada AD.The original issue of this AD became effective on 10 April 2008. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n16 July 2008","sortOrder":0},{"sectionNumber":"AD/DHC-8/140 Amdt 1","sectionType":"part","heading":"AD/DHC-8/140 Amdt 1","content":"## AD/DHC-8/140 Amdt 1","sortOrder":1},{"sectionNumber":"Elevator Overload Bungee","sectionType":"part","heading":"Elevator Overload Bungee","content":"## Elevator Overload Bungee","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The amendment revises the AD's applicability to a specific set of serial numbers and corrects the overload bungee part number to FE289000001, aligning the AD with Transport Canada AD CF-2007-30R1; the original AD became effective 10 April 2008."},"complexity_factors":["Narrow applicability: specific DHC‑8‑400 serial numbers listed (Applicability).","Multiple discrete actions required: visual inspection, removal/reinstallation if incorrect, label attachment, and re‑identification of P/N (Requirement 1).","Immediate prohibition on installing old P/N FE289000000 — only re‑identified P/N FE289000001 permitted (Requirement 2).","Compliance timing split: inspection within 5,000 flight hours; prohibition effective immediately (Compliance).","Dependency on Bombardier SB 84‑27‑30 and allowance for later Transport Canada‑approved revisions introduces administrative dependency (Requirement 1).","Acceptance of prior accomplishment under earlier SB revisions creates record‑checking and verification burden (Requirement 1).","Safety rationale tied to potential loss of elevator centring if a bungee disconnects inboard (Background).","Regulatory correction: amendment revises applicability and corrects P/N to align with referenced Transport Canada AD (Background)."],"plain_english_summary":"This directive requires operators of specified Bombardier DHC‑8‑400 series aeroplanes to check elevator overload bungees for correct orientation, correct any misinstalled units, add orientation labels and re‑identify the part number. It follows Bombardier Service Bulletin SB 84‑27‑30 (or later Transport Canada–approved revisions), sets a 5,000‑flight‑hour inspection compliance, and bans installation of the old part number; operators and maintenance organisations bear the inspection, repair and documentation costs."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment (Amendment 1) to an existing Airworthiness Directive, but it remains tightly focused on its original purpose: correcting the installation of elevator overload bungees on specific DHC-8 aircraft. The amendment revises applicability and corrects a part number error, but does not expand beyond the original safety issue."},"complexity_factors":["Multiple specific part numbers (P/N FE289000000, FE289000001, FE289006200) requiring precise tracking","Cross-references to external documents: Bombardier Service Bulletin SB 84-27-30 (Revision C) and Transport Canada AD CF-2007-30R1","Conditional compliance paths: previous completion of earlier service bulletins or AD revisions can satisfy requirements","Nested applicability: specific aircraft models AND specific serial number ranges","Two distinct compliance deadlines (5000 flight hours for inspection, immediate for spare parts ban)","Technical aviation terminology requiring domain knowledge (elevator overload bungee, Modsum, flight hours)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of specific Bombardier DHC-8-400 series aircraft (serials 4003, 4004, 4006, 4008–4159) to inspect and correct elevator overload bungees that may have been installed backwards. Incorrect installation can prevent the elevator returning to centre if a bungee disconnects, risking pitch control.\n\nRequired actions: inspect both sides, fix any incorrect installations before further flight, add orientation labels, re-identify the part (FE289000001) and prohibit the old part; compliance within 5,000 flight hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee","history":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee/history","analysis":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee/analysis","conflicts":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee/conflicts","importantCases":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee/important-cases","documents":"/api/acts/ad-dhc-8-140-amdt-1-elevator-overload-bungee/documents"}}