【美国联邦航空管理局 (FAA) ：旧金山国际机场禁止并排起降！】
在旧金山国际机场 (SFO) 看到西南航空的 737 和联合航空的 757 并排起降，真是令人赏心悦目。

可惜的是，美国联邦航空管理局 (FAA) 现已禁止此类起降。

FAA 于 2026 年 4 月正式禁止在旧金山国际机场 (SFO) 进行并排起降。这项决定终结了航空界最具标志性的景象之一——乘客们常常可以透过舷窗看到另一架喷气式飞机在几百英尺外降落。

这项禁令的出台源于一系列备受瞩目的“险些相撞”事故后，国家安全标准的转变。

1. 核心原因：安全与风险控制

主要原因是旧金山国际机场的两条平行跑道（28L 和 28R）距离过近。

750英尺间隔：这些跑道之间的距离仅为750英尺——是美国主要枢纽机场中距离最近的。

“目视”漏洞：历史上，美国联邦航空管理局（FAA）只允许在晴朗天气下，且飞行员“保持目视间隔”的情况下进行并排着陆。FAA现在认定，在如此近的距离下，仅依靠人眼观察已不再符合现代安全标准。

系统性安全审查：这项决定源于2025年初美国航空5342航班的致命空中相撞事故（一架喷气式飞机和一架直升机相撞），该事故引发了全国范围内的安全行动。虽然那次事故并非发生在旧金山国际机场（SFO），但它迫使FAA取消了容错率极低的“高风险”程序。

2. 新要求：“交错”进近

飞机现在必须采用交错进近，而不是翼尖对翼尖飞行。

一架飞机必须与另一架飞机保持显著的偏移（向前或向后）。

这确保了如果一架飞机因机械故障或风切变而偏离航线或急转弯，不会立即与相邻飞机相撞。

3. 对旅客的影响（“旧金山机场延误”）

这项安全措施对机场效率产生了巨大的连锁反应：

容量削减：旧金山机场的到达航班数量减少了三分之一，从每小时 54 架次降至 36 架次。

“双重打击”：这项禁令恰逢一项为期六个月的大型跑道重铺工程（持续到 2026 年 10 月），该工程已导致两条南北向跑道停用。

航空公司受影响：美联航和阿拉斯加航空受到的影响最大。旅客被告知，高峰时段平均延误时间为 30 至 60 分钟，因为机场已无法像以前那样快速疏导客流。

虽然许多飞行员和爱好者对“旧金山平行跑道”的终结感到惋惜，但美国联邦航空管理局（FAA）已明确表示：并排降落的时代已经结束，而且这一改变是永久性的。

BANNED: Parallel takeoffs and landings in San Francisco International Airport!

It is nice to see parallel takeoffs at SFO - Southwest 737 and a United 757.

These kind of takeoffs and landings are now banned by the FAA unfortunately.

The FAA officially banned simultaneous "side-by-side" landings at San Francisco International Airport (SFO) in April 2026. This decision ends one of the most iconic sights in aviation, where passengers could often look out their window and see another jet landing just a few hundred feet away.

The ban is driven by a shift in national safety standards following a series of high-profile "near-miss" incidents.

1. The Core Reason: Safety & Risk Reduction
The primary driver is the extreme proximity of SFO's parallel runways (28L and 28R).

750-Foot Separation: These runways are spaced only 750 feet apart—the closest of any major U.S. hub.

The "Visual" Loophole: Historically, the FAA allowed side-by-side landings only in clear weather if pilots "maintained visual separation." The FAA has now determined that relying on human sight alone at such close proximity no longer meets modern safety margins.

Systemic Safety Review: The decision followed a nationwide safety push triggered by the fatal mid-air collision of American Airlines Flight 5342 in early 2025 (which involved a collision between a jet and a helicopter). Although that crash didn't happen at SFO, it forced the FAA to eliminate "high-risk" procedures where the margin for error was razor-thin.

2. The New Requirement: "Staggered" Approaches
Instead of flying wingtip-to-wingtip, planes must now use staggered approaches.

One aircraft must be significantly offset (ahead or behind) the other.

This ensures that if one plane "deviates" or swerves due to a mechanical issue or wind shear, it won't immediately collide with the plane next to it.

3. Impact on Travelers (The "SFO Delay")

This safety measure has a massive ripple effect on airport efficiency:

Capacity Cut: SFO’s arrival rate has been slashed by one-third, dropping from 54 flights per hour to just 36.

The "Double Whammy": This ban coincides with a major six-month repaving project (running through October 2026) that has already taken the two north-south runways out of service.

Airline Impact: United and Alaska Airlines are seeing the most disruptions. Travelers are being warned to expect average delays of 30–60 minutes during peak hours, as the airport can no longer "flush" traffic through as quickly as it once did.

While many pilots and enthusiasts are sad to see the end of the "SFO Parallel," the FAA has made it clear: the era of side-by-side landings is over, and the change is permanent.

Video: thurber_shots http://t.cn/AXJpfgAy