FAA Orders New Sensors Before Aging Engines Become Fire Hazards
Published Date: 10/19/2026
Rule
Summary
If you own or operate planes with Pratt & Whitney PW4000 series engines, listen up! The FAA found that some sensors can wear out and cause dangerous engine problems like fires or shutdowns. Starting November 23, 2026, these sensors must be replaced to keep flights safe—so plan for some maintenance and costs soon!
Analyzed Economic Effects
4 provisions identified: 1 benefits, 3 costs, 0 mixed.
Mandatory Pb‑sensor replacements on PW4000 engines
If you own or operate aircraft with Pratt & Whitney PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4460, or PW4462 engines, you must replace the pressure burner (Pb) sensor(s) per the AD starting on the effective date November 23, 2026. A “part eligible for installation” is defined as a Pb sensor with less than 30,000 flight hours since new or since last repair and less than 10 years since new or since last repair.
Estimated replacement cost per engine and nationwide
The FAA estimates replacement will cost about $15,864 per engine (2 work-hours at $85/hour = $170 labor plus $15,694 parts). The FAA estimates the AD affects 210 engines on U.S. registry for a total U.S. operators' cost of $3,331,440.
Reduces risk of engine fire or shutdown
The AD was issued because undetected deterioration of Pb sensors caused tailpipe fire, loss of thrust control, and engine in-flight shutdown. Replacing the Pb sensors is intended to detect and correct that deterioration and reduce those engine-safety failures.
Specific compliance timing rules and deadlines
The AD requires replacement per a table of deadlines based on each Pb sensor’s flight hours and years since new or repair, and for Pb sensors with less than 30,000 flight hours and less than 10 years as of November 23, 2026, replacement is required whichever occurs later: before the sensor reaches 30,000 flight hours or 10 years since new/repair, or within 30 months after November 23, 2026. Table 1 in the AD sets differing month deadlines based on current hours and years since new or repair.
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