飞机结构定义

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飞机结构

4. Definitions

4. 定义

A. The definitions of primary and secondary structures are as follows: A. 定义基本的和次级的结构依下列各项:

WARNING: THE FAILURE OF PSE’S COULD RESULT IN THE CATASTROPHIC FAILURE OF THE AIRPLANE.

警告: PSE (主要构件)的失效可以造成飞机灾难性的故障。

(1) Primary Structure: Structure which carries flight, ground, or pressure loads. Primary structure is classified into two categories: Principal Structural Elements (PSE) and Other Structure. Most of the primary structures on the airplane are Principal Structural Elements (PSE). PSEs are also known as Structural Significant Items (SSI). (1) 基本结构:承传受飞行, 地面, 或压力载荷的结构。基本的结构又分为两类: 主要构件 (PSE) 和其他构件。飞机上的大部分基本结构是主要构件(PSE). PSEs (主要构件)也是被作为结构的重要项目(SSI).

(a) Principal Structural Elements (PSE): Primary structure which contribute significantly to carrying flight, ground, and pressurization loads, and whose failure could result in the catastrophic failure of the airplane.

(1) 主要构件 (PSE):主要承受飞行, 地面, 和压力载荷的基本结构,这些构件

的失效将造成飞机的灾难性故障。

(b) Other Structure: Primary structure that is not a Principal Structural Element (PSE).

(b) 其他的结构: 基本结构中不是主要构件的部分 (PSE).

(2) Secondary Structure: Structure which carries only air or inertial loads generated on or within the secondary structure. Most secondary structures are important to the aerodynamic performance of the airplane.

(2) 次级结构:承受空气或次级结构本身产生的惯性载荷的结构。大部分次级结构对飞行的气动性能很重要。

修理定义

1. Applicability

A. This subject gives the definitions related to repair classification and inspection for damage-tolerant

and non-damage tolerant primary and secondary structures as applicable.

2. References

Reference Title

51-10-02 INSPECTION AND REMOVAL OF DAMAGE

SOPM 20-20-01 Magnetic Particle Inspection

SOPM 20-20-02 Penetrant Methods of Inspection

3. General Information

A. There are two classifications of repairs in this SRM:

(1) Repairs that have been evaluated and analyzed for damage tolerance capability and are

classified as Category A, B, or C repairs.

NOTE: Repairs to Principle Structural Elements (PSE’s) in the wing, nacelle and pylon

structures (identified in 51-00-04) are required to be evaluated for damage

tolerance capability.

(2) Repairs that have not been evaluated and analyzed for damage tolerance capability and are

classified as Permanent, Interim or Time-Limited Repairs. These classifications apply to all

fuselage and empennage repairs

B. The definitions of the different categories of damage tolerant repairs are as follows:

(1) Category A Repair: A permanent repair for which the inspections given in the Maintenance

Planning Data (MPD) document, are sufficient and no other actions are necessary.

(2) Category B Repair: A permanent repair for which supplemental inspections are necessary at the

specified threshold and repeat intervals.

(3) Category C Repair: A time-limited repair which must be replaced and reworked within a

specified time limit. Also supplemental inspections can be necessary at a specified threshold

and repeat interval.

C. The definitions of the different types of repairs that have not been evaluated and analyzed for

damage tolerance are as follows:

(1) Permanent Repair: A repair where no action is necessary except the operator’s normal

maintenance.

(2) Interim Repair: A repair that has the necessary structural strength and could stay on the aircraft

indefinitely. The repair must be inspected at specified intervals and replaced if deterioration is

detected or damage is found.

(3) Time-Limited Repair: A repair that has the necessary structural strength but does not have

sufficient durability. This repair must be replaced after a specified time,

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