NTSB CAROL · Event
Event CEN21LA132
Registry · N312MB
FAA Aircraft Registry record.
Make / Model
BEECH B100
Year of manufacture
1981 · 40 years old at event
Engine
GARRETT TPE331-6 (750 hp)
Seats / Engines
11 seats · 2 engines
Last airworthiness date
19950818
ADS-B equipped
Yes — Mode-S A34F54
Registrant of record
N312MB LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The failure of the right-side window inner pane for reasons that could not be determined based on available evidence.
Factual narrative
On February 17, 2021, about 2130 central standard time, a Beech B100 airplane, N312MB, was substantially damaged when it was involved in an accident near Lubbock, Texas. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 business flight. The pilot reported that about an hour after departure, while the airplane was in cruise flight, he heard a “cracking noise” and noticed that the right windshield had cracked. The windshield remained in place and pressurization was not lost. The pilot notified the air traffic controller that he had a cracked windshield. The flight then descended and diverted to a nearby airport, where it was discovered that the right-side windshield displayed cracks in the inner pane, which is considered substantial damage in a pressurized airplane. The pilot reported that the windshield had accumulated 3,152.3 flight hours and 2,235 cycles. The window manufacturer reported the windshield was manufactured in 1998 and that it had met its expected life cycle. The windshield was disposed of before further testing could be performed to determine the failure mode. About an hour after departure, while the airplane was in cruise flight, the pilot and passenger heard a “cracking noise” and noticed that the right windshield had cracked. The windshield remained in place and pressurization was not lost. The pilot notified the air traffic controller that he had a cracked windshield and diverted to a nearby airport. The airplane landed uneventfully and examination revealed substantial cracking damage to the right-side windshield inner pane. The windshield was disposed of before further testing could be performed to determine the failure mode. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- — Aircraft-Aircraft structures-Windows-windshield system-Flight compartment windows-Failure
Verbatim from NTSB's published report. Source file
NTSB_2021_CEN21LA132.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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