自动减速板系统失效保留，应该按MEL27-07-01还是MEL27-07-02？

MEL27-08襟翼负载限制器系统保留也有SFP构型区分，并且对于SFP构型的飞机，O项或限制项有些区别，所以有必要搞清楚按哪条款保留。

解答这个问题的关键是弄清SFP。

关于SFP，AMM手册并没有提到。但是在MEL有相关信息，我们使用SFP搜索发现，SFP飞机的一个特点是襟翼手柄放到30以上，前缘缝翼才全伸出。

反查AMM SDS，对于30度缝翼全伸出的飞机有GUN 041, 043, 215, 224, 226, 229-999。

也可以查询波音 737-700/800 快速检查单，带短跑道性能构型的飞机有YR302, YR310，YS966-YS977, YS981 -YS987;YW401 -YW430;YW441 -YW444。

再反查有效性页面就能确认哪些飞机属于SFP构型了。包括B-5586/5598/1737/1776/1780等。

往下滑

往下滑

往下滑

到底了

关于SFP，详细说明可查阅阮工频道这两篇文章：

让波音告诉你“短跑道构型”到底是个什么鬼

“双位尾橇”是个什么鬼？

在网上也搜了  关于SFP的一些背景和资料，大部分内容阮工的文章已涵盖。

The 737 design enhancements allow operators to fly increased payload in and out of airports with runways less than 5,000 feet long.

737的设计增强功能使运营者可以在跑道长度小于5000英尺的进场和离场飞行增加有效载荷。

The design enhancements include a two-position tail skid that enables reduced approach speeds, sealed leading-edge slats that provide increased lift during takeoff, and increased flight spoiler deflection on the ground that improves takeoff and landing performance.

设计改进包括一个可以降低进近速度的双位置尾橇，在起飞期间提供更多升力的密封缝翼，和在地面提高起飞和着陆性能的增加偏转角的飞行扰流板。

The short-field performance changes were developed in 2004 in response to Brazilian airline GOL's needs at Santos Dumont airstrip in Rio de Janeiro. The 4,300-foot runway is short compared to other runways and could not accommodate larger aircraft at higher approach speeds with full payloads.

为应对巴西航空公司GOL在里约热内卢桑托斯杜蒙机场的需求，2004年对短场性能进行了调整。4300英尺的跑道与其他跑道相比很短，无法容纳更高进近速度和满负荷的飞机。

The short-field design package is an option on the 737-600, -700 and -800 and is standard equipment for the 737-900ER.

短场设计包在737-600，-700和-800飞机是一种选装构型，在737-900ER是标准构型。

The enhancements increase payload capability for landing up to 8,000 pounds and increase payload capability for takeoff up to 2,000 pounds on the 737-800.

在737-800飞机增强性，为着陆提高载荷能力高达8000磅，为起飞提高载荷能力高达2000磅。

Short Runway Package Technical Aspects:

短跑道包技术方面：

A winglet lift credit, achieved through additional winglet testing, that allows the use of lower landing-approach speeds。

通过测试实现的翼梢，允许使用较低的着陆接近速度。

Takeoff performance improvements such as using sealed leading-edge slats on all takeoff flap positions, which allows the airplane to climb up and away more rapidly on shorter runways.

起飞性能的提高，比如起飞全襟翼使用密封的前缘缝翼，这使得飞机在较短的跑道上爬升和离场更快。

A reduced idle thrust transition delay between approach- and ground-idle speeds, which improves stopping distances and increases field-length-limited landing weight.

减少了进近和地面怠速之间的怠速推力过渡延迟，改善了滑行距离，提高了跑道长度有限的着陆重量。

Increased flight-spoiler deflection from 30 degrees to 60 degrees, which aids brake performance when landing.

飞行扰流板偏转从30度增加到60度，这有助于着陆时刹车性能。

A two-position tailskid at the rear of the aircraft. The tailskid protects longerbodied 737-800s against inadvertent tailstrikes during landing, which allows higher aircraft approach attitudes and lower landing speeds.

飞机尾部有两个位置尾翘。在着陆过程中，尾翘保护长机体737-800飞机，避免着陆时机尾擦地。从而允许飞机以更高的姿态和更低的速度着陆。