{"id":"F2006B06642","name":"AD/ROCK-114/1 Amdt 4 - Front Seat and Shoulder Harness","slug":"ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48552,"registerId":"commonwealth-F2006B06642-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ROCK-114/1 Amdt 4 - Front Seat and Shoulder Harness","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)  \nGulfstream (Rockwell) 114 Series Aeroplanes\n\nAD/ROCK-114/1\n\nAmdt 4\n\n  \nFront Seat and Shoulder Harness 7/87\n\nApplicability: All models 114 and 114A with S/Nos. 14000 to 14540.\n\nRequirement: Unless already accomplished modify the front seats and belt attachments in accordance with either:\n\n    Rockwell Service Bulletin SB-114-5A, or\n\n    b. Gulfstream Aerospace SB-114-21A Rev 1.\n\nCompliance: Within 100 hours time in service after 30 June 1987 but no later than 30 June 1988.\n\nBackground: This Directive is amended to reflect the resolution of the problems affecting earlier issues. It should be noted that whilst the Rockwell Bulletin modifies the aircraft seats and belts to the minimum acceptable standard required by ANO 101.22 there have been accidents overseas which were classified as surviveable, in which the seat occupants were fatally injured. Following those accidents the Gulfstream Bulletin was issued which increased the margin of safety to compensate for the fuselage deflection phenomena of this aircraft design.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is Amendment 4 of an existing Airworthiness Directive. The scope remains tightly focused on the original safety issue (front seat harness integrity) and has not expanded beyond the specific aircraft models and modification requirements originally identified. The amendment merely updates the directive to reflect resolution of problems with earlier issues and clarifies the safety rationale for preferring the Gulfstream modification over the Rockwell option."},"complexity_factors":["Single, clearly defined applicability (specific aircraft models and serial number range)","Only two alternative compliance methods specified","Simple temporal compliance window (100 hours OR fixed calendar date, whichever comes first)","No defined terms section or interpretation provisions","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Straightforward binary requirement (modify/don't modify) with no conditional exceptions or nested provisions","Total length under 300 words"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or modifications to aircraft.\n\n**What it does:**\nOrders owners and operators of certain Gulfstream (formerly Rockwell) 114 series aeroplanes to upgrade the front seat belts and shoulder harnesses to a stronger safety standard.\n\n**Who it affects:**\n- All Model 114 and 114A aircraft with serial numbers 14000 to 14540\n- Aircraft owners, operators, and maintenance organisations responsible for these planes\n\n**Why it matters:**\nThe original seat belt design met minimum legal standards, but overseas accidents revealed a deadly flaw. In crashes that should have been survivable, front seat occupants were killed because the aircraft fuselage (the main body of the plane) flexed and deformed on impact in ways the original harnesses couldn't handle. This directive mandates a stronger retrofit that accounts for this \"fuselage deflection phenomenon\" — essentially, the way this particular aircraft design bends in a crash.\n\n**What must be done:**\nOwners must choose one of two approved modification kits:\n- **Option A:** Rockwell Service Bulletin SB-114-5A (meets minimum standard)\n- **Option B:** Gulfstream Aerospace SB-114-21A Revision 1 (stronger, preferred option with greater safety margin)\n\n**Deadline:**\nWithin 100 flight hours after 30 June 1987, but absolutely no later than 30 June 1988.\n\n**Key takeaway:** This directive closes a safety gap where technically \"legal\" equipment proved deadly in real-world crashes, pushing operators toward the more robust Gulfstream modification rather than the bare minimum fix."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment updates the Airworthiness Directive to require modification of front seats and belt attachments for Gulfstream (Rockwell) 114/114A aircraft with S/N 14000–14540 in accordance with either Rockwell SB-114-5A or Gulfstream SB-114-21A Rev 1, and it sets a specific compliance window (within 100 hours TIS after 30 June 1987 but no later than 30 June 1988). The accompanying background states the amendment reflects resolution of earlier problems and notes that the Gulfstream bulletin increases the safety margin beyond the minimum required by ANO 101.22 to address a fuselage deflection phenomenon."},"complexity_factors":["Aircraft- and serial-number-specific applicability (models 114 and 114A, S/N 14000–14540)","Two alternative technical compliance paths (Rockwell SB-114-5A or Gulfstream SB-114-21A Rev 1) requiring operators to choose","Tight compliance timing: within 100 hours time-in-service after a date but with an absolute latest date","Cross-reference to an external regulatory standard (ANO 101.22) and to external technical documents (service bulletins)","Technical nature of required modifications (seats and belt attachments) requiring maintenance facilities, parts, and engineering work"],"plain_english_summary":"Operators of Gulfstream (Rockwell) 114/114A aircraft S/N 14000–14540 must modify front seats and seat-belt attachment points per either Rockwell SB-114-5A or Gulfstream SB-114-21A Rev 1, completing work within 100 flight hours after 30 June 1987 or by 30 June 1988. The amendment notes the Gulfstream option gives an extra safety margin to address fuselage‑deflection‑related occupant injuries."}},"importantCases":[],"_links":{"self":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness","history":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness/history","analysis":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness/analysis","conflicts":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness/conflicts","importantCases":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness/important-cases","documents":"/api/acts/ad-rock-114-1-amdt-4-front-seat-and-shoulder-harness/documents"}}