747 pilots beware: Your seat could drive itself now!
Published Date: 2/12/2025
Rule
Summary
If you fly or work with Boeing 747 planes, listen up! The FAA is updating safety rules to fix a problem where pilots’ seats might move on their own. Starting March 19, 2025, airlines must inspect more seat parts and keep checking to keep pilots safe. This update builds on earlier rules and helps prevent unexpected seat shifts without breaking the bank.
Analyzed Economic Effects
5 provisions identified: 2 benefits, 3 costs, 0 mixed.
Potential high-cost repairs and tooling
If on-condition repairs are needed, the FAA estimates costs such as up to $6,759 to overhaul the horizontal movement system, $8,022 to replace a horizontal actuator, and up to $46,064 for tooling to align a seat for control-lever cable adjustment.
Mandatory inspections for Boeing 747 pilot seats
If you operate or maintain Boeing Model 747-200B/C/F, 747-300, 747-400 (including D/F variants), 747-8F, or 747-8 series airplanes, you must by March 19, 2025 inspect and identify the Captain's and First Officer's seat part numbers (and serial numbers if applicable) and perform a one-time detailed inspection and repetitive checks of the horizontal movement system as specified in Boeing Special Attention Service Bulletins 747-25-3644 (Rev 2) and 747-25-3653 (Rev 2).
FAA cost estimates for U.S.operators
The FAA estimates this AD affects 162 U.S.-registered airplanes. Estimated per-seat labor costs are $85 for identification, $85 for the detailed inspection, and $170 per repetitive check cycle; the FAA totals these as up to $117,980 for identification, $27,540 for detailed inspections, and $55,080 per repetitive check cycle across U.S. operators.
Installing serviceable seat ends repetitive checks
The AD allows an optional terminating action: installing a serviceable Captain's or First Officer's seat as described in Boeing Special Attention Service Bulletin 747-25-3653 (Rev 2) will terminate the repetitive HMS checks required by this AD, if installed per the service bulletin instructions.
Exemptions when prior work documented
If airplane records show a Captain's or First Officer's Ipeco seat meets the criteria in Table 1 to paragraph (j) (for example, specific Ipeco part numbers and prior service-bulletin work or documented manual override cable maintenance), then the inspections and checks required by paragraphs (g) and (h) are not required for that seat.
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Key Dates
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