机身结构
737 NG Aft Pressure Bulkhead (PMA)
PMA-approved aft pressure bulkhead for Boeing 737 NG series. Direct replacement for discontinued OEM P/N with identical performance.
关键信息
- 零件编号： AFR-B737-APB-003
- 认证：FAA / EASA / CAAC
- 可追溯性：包含完整文档
注意：除非另有书面约定，否则工业燃气轮机和非认证应用将提供替代方案。
产品详情
PMA Approval and Regulatory Compliance
This aft pressure bulkhead is manufactured under a FAA Production Approval (PMA) specifically authorized as a direct replacement for the discontinued Boeing 737 NG original equipment part number. The PMA designation means this component has been engineering-tested, flight-evaluated, and approved by the FAA as functionally and dimensionally identical to the OEM part. Installation of this PMA part does not require any STC or field approval and is treated identically to the original OEM component for airworthiness purposes.
Applicable Aircraft Models
The bulkhead is approved for installation on Boeing 737-600, 737-700, 737-800, and 737-900 series aircraft. It is a direct form-fit-function replacement with no modification to the airframe required. The part is fully interchangeable with the original OEM P/N and can be mixed within fleet inventories without restriction.
Pressure Testing and Structural Integrity
Each bulkhead undergoes hydrostatic pressure testing to 1.5 times the maximum operating cabin differential pressure before release. The test cycle simulates repeated pressurization-depressurization sequences equivalent to 60,000 flight cycles to validate fatigue life. Material certification is provided for the 2024-T351 aluminum alloy forging from which each bulkhead is machined.
Dimensional verification is performed on a CMM against the Boeing master definition. Critical callouts include the seal land flatness, bolt hole pattern true position, and the window cutout edge profile. All results are recorded in the part's lifetime traceability file and shipped with the unit.
Interchangeability and Installation
Installation follows Boeing 737 AMM Chapter 53 procedures with no special tooling beyond standard airframe equipment. The bulkhead ships with pre-instilled sealant beads, bonded thermal/acoustic insulation pads, and all attachment hardware. Operators transitioning from the OEM part to this PMA alternative report zero fitment issues and identical in-service performance across multiple fleet installations.