{"id":"F2006B05648","name":"AD/PA-28/93 - Flap Handle Attach Bolt","slug":"ad-pa-28-93-flap-handle-attach-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135339,"registerId":"commonwealth-F2006B05648-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/93 - Flap Handle Attach Bolt","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-28 Series Aeroplanes\n\nAD/PA-28/93 Flap Handle Attach Bolt 9/96\n\nApplicability: PA28-140 28-20000 through 28-26946 and 28-7125001 through\n\n28-7725290\n\nPA28-150, PA28-160, and PA28-180\n\n  \n28-1 through 28-5859, 28-7105001 through 28-\n\n7505259, 28-E13, and 28-03\n\nPA28-151 28-7415001 through 28-7715314\n\nPA28-161 28-7716001 through 28-8616057, 2816001 through\n\n2816102, and 2841001 through 2841346\n\nPA28-181 28-7690001 through 28-8690062 and 2890001 through\n\n2890169\n\nPA28-235 28-10001 through 28-11378, 28-7110001 through 28-\n\n7710089, and 28-E11\n\nPA28-236 28-7911001 through 28-8611008 and 2811001 through\n\n2811034\n\nPA28-201T 28-7921001 through 28-7921095\n\nPA28R-180 28R-30001 through 28R-31270 and 28R-7130001\n\nthrough 28R-7130013\n\nPA28R-200 28R-35001 through 28R-35820 and 28R-7135001\n\nthrough 28R-7635462\n\nPA28R-201 28R-7737001 through 28R-7837319 and 2837001\n\nthrough 2837059\n\nPA28R-201T 28R-7703001 through 28R-7803374 and 2803001\n\nthrough 2803012\n\nPA28RT-201 28R-7918001 through 28R-8218026\n\nPA28RT-201T 28R-7931001 through 28R-8631005 and 2831001\n\nthrough 2831038\n\nRequirement: a) Measure the cable mounting attach hole diameter and enlarge the hole to .316 of an inch diameter. If the diameter of the cable mount attach hole is larger than .316 of an inch, replace the flap lever handle (refer to the illustrated parts catalogue for the part number), in accordance with the Instructions section of Piper SB 965.\n\n    b) Install a new bushing (using only Piper part number (P/N) 63900-174) into the cable mounting attach hole, in accordance with the Instructions section of Piper SB 965.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n    c) Replace the flap lever handle attach bolt with a new clevis bolt (Piper P/N 400 673 or standard P/N AN23-11) in accordance with the Instructions section of Piper SB 965.\n\n    d) Inspect the washer, nut, and cotter pin, and if damaged, replace washer (Piper P/N 407-564 or standard P/N AN960-10), nut (Piper P/N 404-392 or standard P/N AN320-3), and cotter pin (Piper P/N 424-051 or standard P/N MS24665-132) in accordance with the Instructions section of Piper SB 965.\n\nNote 1: FAA AD 96-10-03 Amdt 39-9608 refers.\n\nNote 2: The Requirement instructions of this Directive do not mirror the instructions in Piper SB 965. This Directive requires installing the clevis bolt, regardless of the condition of the current part.\n\nCompliance: Upon the accumulation of 2,000 hours time in service or within the next 100 hours time in service after 15 August 1996, whichever occurs later.\n\nBackground: The FAA received reports of worn flap handle attach bolts and elongated holes in the flap lever to cable mounting attach point. Failure of the flap handle attach bolt could cause a sudden retraction of the flaps, and result in loss of control.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a defined aircraft fleet. The scope remains tightly focused on the original safety purpose — preventing flap handle attachment failures. The extensive serial number list reflects the breadth of affected aircraft rather than scope creep."},"complexity_factors":["Extensive serial number applicability list (17 distinct model variants with multiple serial number ranges each)","Precise technical measurements required (.316 inch diameter specification)","Multiple alternative part numbers provided (Piper proprietary numbers and standard aviation part numbers)","Conditional logic in compliance timing (whichever occurs later of two triggers)","Cross-reference to external technical document (Piper Service Bulletin 965) for detailed instructions","Explicit deviation note stating the AD requirements differ from the manufacturer's service bulletin"],"plain_english_summary":"This Airworthiness Directive orders owners/operators of specific Piper PA‑28 variants to inspect and repair the flap‑handle attachment to stop bolt wear and mounting‑hole elongation. The fix—new bushing and stronger clevis bolt—prevents unexpected flap retraction in critical phases of flight. It affects thousands of older Cherokee/Warrior/Archer/Dakota aircraft and addresses a known loss‑of‑control safety risk."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The Directive narrows and extends the manufacturer instructions by explicitly requiring the clevis bolt installation regardless of the existing part's condition, diverging from the instructions in Piper SB 965 (see Note 2). This makes the AD's mandatory scope broader than the SB's conditional instructions."},"complexity_factors":["Multiple affected models and many specific serial‑number ranges (Applicability) increasing tracking burden","Measurement threshold and conditional work: measure hole diameter and either enlarge or replace the handle (Requirement a)","Mandatory installation of a specific bushing part (P/N 63900-174) (Requirement b)","Directive mandates replacement of attach bolt with specified clevis bolt regardless of current part condition (Requirement c; Note 2)","Inspection and conditional replacement of small hardware (washer, nut, cotter pin) with specific part numbers (Requirement d)","Fixed compliance trigger tied to hours in service (Compliance), requiring maintenance scheduling","Divergence from manufacturer service bulletin wording (Note 2) creating potential compliance interpretation issues","Safety‑critical nature (risk of sudden flap retraction) elevates urgency and inspection quality requirements (Background)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of the listed Piper PA‑28 serials to measure the flap handle cable‑mount hole, repair or replace the flap lever or enlarge the hole if needed, install a specified bushing, fit a specified clevis attach bolt, and inspect/replace the washer, nut and cotter pin. Compliance must occur by the stated hours‑in‑service deadline. It matters because worn bolts or elongated holes can allow sudden flap retraction; the directive imposes these mandatory inspections and parts changes at the owner/operator’s expense."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt","history":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt/history","analysis":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt/analysis","conflicts":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt/conflicts","importantCases":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt/important-cases","documents":"/api/acts/ad-pa-28-93-flap-handle-attach-bolt/documents"}}