2020-16-51: Pneumatic
Emergency order 2020-16-51 is an airworthiness directive. The FAA's subject line: Pneumatic. It names Boeing 737: about 2,896 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: heating, ice protection and utility systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- The Boeing Company
- Models
- 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-700C Series, 737-800 Series, 737-900 Series, 737-900ER Series
- On this site
- Boeing 737 2,896 registered
Dates and paperwork
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
Related safety bulletins advice on the same designs, not orders
2026-10-232026-18 · NOSE/TAIL LANDING GEAR, Installation of AeroControlex STC ST01255CH may allow water to leak and freeze on...
2026-10-032026-17 · VNAV Approach Disconnect Following Missed Approach, Anomaly on Airplanes with FMC U14.0/14.1
2026-01-082026-01 · PITOT/STATIC ANTI-ICE SYSTEM
2025-09-082025-08 · INDICATING/RECORDING SYSTEM, Erroneous Illumination of Cabin Altitude Warning Lights in High Altitude Landing Mode
2021-08-03AIR-21-12 · Thrust Reversers
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2020-16-51.json · aircraft systems.