{"id":"F2006B03925","name":"AD/BEECH 400/22 - Loss of Airspeed Indication","slug":"ad-beech-400-22-loss-of-airspeed-indication","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43534,"registerId":"commonwealth-F2006B03925-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Beechcraft 400 Series Aeroplanes","sectionType":"part","heading":"Beechcraft 400 Series Aeroplanes","content":"# Beechcraft 400 Series Aeroplanes\n\nAD/BEECH 400/22 Loss of Airspeed Indication 2/2002\n\nTX\n\nApplicability: All Model Beech 400, 400A and 400T series aeroplanes.\n\nRequirement: Revise the Emergency Procedures Section of the Aircraft Flight Manual (AFM) by inserting a copy of the relevant AFM Temporary Change from the following list:","sortOrder":0},{"sectionNumber":"Aircraft Model","sectionType":"part","heading":"Aircraft Model","content":"#   \nAircraft Model\n\nBeechjet 400T Beechjet 400T Beechjet 400A Beechjet 400A Beechjet 400A Beechjet 400A Beechjet 400A Beechjet 400A Beechjet 400\n\nBeechjet 400","sortOrder":1},{"sectionNumber":"Temporary Change Part Number","sectionType":"part","heading":"Temporary Change Part Number","content":"#   \nTemporary Change Part Number\n\n132-590002-5TC3, dated 12 November 2001\n\n134-590002-1TC3, dated 12 November 2001\n\n128-590001-91TC5, dated 12 November 2001\n\n128-590001-95TC5, dated 12 November 2001\n\n128-590001-107TC5, dated 12 November 2001\n\n128-590001-109TC5, dated 12 November 2001\n\n128-590001-167TC7, dated 12 November 2001\n\n128-590001-169TC3, dated 12 November 2001\n\n128-590001-13BTC1, dated 12 November 2001\n\n128-590001-13BTC2, dated 12 November 2001","sortOrder":2},{"sectionNumber":"``Emergency Procedures (400) Loss of Air","sectionType":"part","heading":"``Emergency Procedures (400) Loss of Airspeed","content":"# \\`\\`Emergency Procedures (400) Loss of Airspeed\n\nNote: If the pilot's and/or copilot's airspeed(s) are noted to be decreasing toward zero, refer to the AOA indicator for airspeed control and land at the nearest suitable airport.\n\n    Autopilot \\- Disconnect\n    Airspeed \\- Slow to and Maintain 0.2 AOA\n    Thrust \\- As Required\n    Speed Brakes - As Required (Slow to 0.25 AOA with speed brakes extended)","sortOrder":3},{"sectionNumber":"Caution","sectionType":"part","heading":"Caution","content":"# Caution\n\nIf icing conditions are anticipated during the descent and approach, turn ice protection systems ON as early as possible prior to penetrating clouds.\n\nMaintain wing anti/deice operation light ON (approximately 70% N2) during descent to assure proper wing anti-ice operation.\n\n    9. Cabin Pressure Control \\- Set Field Elevation + 500 Feet\n    10. Windshield Defog \\- As Required\n    11. Altimeters \\- Set\n\nWhen Ready for Approach\n\n    12. Airspeed \\- Slow to and Maintain 0.3 AOA\n\nNote: Maintain 0.3 AOA throughout the configuration change to Flaps 10 deg. Gear Down. This will yield an airspeed of about 180 knots.\n\n    13. Fuel Management \\- Check\n    14. N1, Landing Distance \\- Confirm\n    15. Cabin Sign \\- Safety\n    16. Windshield Anti-Ice \\- Low\n    17. Hydraulic/Nitrogen Pressure \\- Check\n    18. Engine Sync \\- Off\n    19. Flaps 10 deg.","sortOrder":4},{"sectionNumber":"Emergency Procedures (400A & RJ-61) Loss","sectionType":"part","heading":"Emergency Procedures (400A & RJ-61) Loss of Airspeed","content":"# Emergency Procedures (400A & RJ-61) Loss of Airspeed\n\nNote: If the pilot's, or copilot's and standby, or all three airspeed(s) are noted to be decreasing toward zero, refer to the standby attitude indicator, standby altimeter, standby heading and the AOA indicator for aircraft control and land at the nearest suitable airport. On PFD equipped airplanes, the pilot's and copilots altimeters, attitude displays and heading displays may be unreliable and the autopilot may disconnect. This may be accompanied by amber boxed A/S, ALT, ATT and/or HDG comparator flags. The comparator flags may be followed by red FAIL flags and removal of airspeed and altitude tapes and attitude/heading displays.","sortOrder":5},{"sectionNumber":"Emergency Procedures 400T(T-1A) Loss of ","sectionType":"part","heading":"Emergency Procedures 400T(T-1A) Loss of Airspeed","content":"# Emergency Procedures 400T(T-1A) Loss of Airspeed\n\nNote: If the pilot's, or copilot's and standby, or all three airspeed(s) are noted to be decreasing toward zero, refer to the standby attitude indicator, standby altimeter, standby heading and the AOA indicator for aircraft control and land at the nearest suitable airport. The pilot's and copilots altimeter's, attitude displays and heading displays may be unreliable and the autopilot may disconnect. This may be accompanied by amber boxed A/S, ALT, ATT and/or HDG comparator flags. The comparator flags may be followed by red FAIL flags on the airspeed, altitude, attitude and heading displays.","sortOrder":7},{"sectionNumber":"Emergency Procedures 400T(TX) Loss of Ai","sectionType":"part","heading":"Emergency Procedures 400T(TX) Loss of Airspeed","content":"# Emergency Procedures 400T(TX) Loss of Airspeed\n\nNote: If the pilot's, or copilot's and standby, or all three airspeed(s) are noted to be decreasing toward zero, refer to the standby attitude indicator, standby altimeter, standby heading and the AOA indicator for aircraft control and land at the nearest suitable airport. The pilot's and copilots altimeter's, attitude displays and heading displays may be unreliable and the autopilot may disconnect. This may be accompanied by amber boxed A/S, ALT, ATT and/or HDG comparator flags. The comparator flags may be followed by red FAIL flags on the airspeed, altitude, attitude and heading displays.\n\n    Autopilot \\- Disconnect\n    Airspeed \\- Slow to and Maintain 0.2 AOA\n    Thrust \\- As Required\n    Speed Brakes - As Required (Slow to 0.25 AOA with speed brakes extended)\n\nNote: An AOA of 0.2 (0.25 speed brakes extended) will yield an airspeed of about 210 knots. Use pitch attitude as primary reference. Make small changes in pitch attitude and wait for AOA to stabilize.\n\nWhen Ready for Descent\n\n    5. Seat Belts/Shoulder Harnesses \\- Fastened\n    6. Cabin Sign \\- As Required\n    7. Anti/DeIce Systems \\- As Required","sortOrder":10}],"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":"The instrument amends AFM emergency procedure material by mandating insertion of specific Temporary Changes for the Beech 400 family, thereby formally adding AOA-based loss-of-airspeed procedures, standby-instrument guidance, autopilot-disconnect directions and icing/flap constraints that crews must follow."},"complexity_factors":["Multiple airframe variants covered (Beech 400, 400A, 400T) requiring model-specific Temporary Change documents","Numerous Temporary Change part numbers and dates to be inserted, increasing administrative tracking","Operational shift from indicated airspeed to AOA as primary control reference (0.2–0.3 AOA) for loss-of-airspeed events","Different procedural detail across models (e.g. 0.2 vs 0.3 AOA, speed-brake note, GPWS/FLP overrides), raising training needs","Icing-related conditional rules and flap restrictions that require judgment during approach","Reliance on standby instruments and potential PFD unreliability/autopilot disconnect introduces procedural complexity for crews","Compliance requires formal AFM revision insertion and crew familiarisation—low hardware impact but nontrivial operational change"],"plain_english_summary":"This AD requires operators of all Beech 400, 400A and 400T series aeroplanes to update the Aircraft Flight Manual emergency procedures by inserting specified Temporary Change documents (listed by part number and date). The inserted procedures tell flight crews how to handle loss of airspeed indications—use angle-of-attack (AOA) and standby instruments, disconnect autopilot, slow to 0.2–0.3 AOA, and follow icing and flap restrictions. Operators pay the administrative and training costs; crews must adopt the new procedures in affected flights."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a standard airworthiness directive maintaining its original safety purpose. The document shows some formatting artifacts (repeated headers, markdown fragments) suggesting it may be an extracted or converted version, but the substantive scope remains focused on the original intent: mandating emergency procedure updates for airspeed indication failures."},"complexity_factors":["Multiple variant-specific procedures (400, 400A/RJ-61, 400T T-1A, 400T TX) with subtle differences in step numbering and content","Technical aviation terminology requiring domain knowledge (AOA, N2, GPWS TAC, FLP ORIDE, RAT)","Cross-references to specific Temporary Change part numbers with version dates (12 November 2001)","Conditional logic for icing scenarios with temperature thresholds (-8°C, +10°C) and time limits (10 minutes)","Nested procedural steps with numbered sequences that vary between aircraft variants","Dual-use military/civil applicability (T-1A Jayhawk trainer and TX variant mentioned alongside civilian models)"],"plain_english_summary":"This AD requires owners/operators of Beechcraft 400-series jets to insert Temporary Changes into their Aircraft Flight Manuals establishing new emergency procedures that use the AOA indicator as the primary speed reference after loss of airspeed indication.\n\nIt affects pilots, operators and maintenance organisations of those aircraft and matters because unreliable airspeed — often worsened by icing — can lead to stall, overspeed, and fatal accidents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication","history":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication/history","analysis":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication/analysis","conflicts":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication/conflicts","importantCases":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication/important-cases","documents":"/api/acts/ad-beech-400-22-loss-of-airspeed-indication/documents"}}