Parts · Airframe structure

Cusp Web

1,348 failure reports named the cusp web in the last ten years, 5,719 since 1995, most often on the Boeing 717; the condition most often found was "corroded".

Reports by year

Reports by year, as a table

	reports
1995	2
1996	5
1997	22
1998	8
1999	4
2003	2
2004	48
2005	69
2006	62
2007	155
2008	217
2009	400
2010	437
2011	429
2012	512
2013	633
2014	519
2015	847
2016	581
2017	350
2018	111
2019	81
2020	15
2021	12
2022	5
2023	6
2024	119
2025	30
2026	38

Which system the reports file it under last ten years

Airframe structure1,348

Reports by system, as a table

	reports
Airframe structure	1,348

Models most often reporting it last ten years

Boeing 717651Mcdonnell Douglas Aircraft Co MD-88512Boeing 75742Boeing 73729Mcdonnell Douglas Aircraft Co MD 8318Douglas DC-98Airbus A3006Mcdonnell Douglas DC-96Airbus A3203Bombardier CL-600 Challenger and CRJ1

Models most reported, as a table

	reports
Boeing 717	651
Mcdonnell Douglas Aircraft Co MD-88	512
Boeing 757	42
Boeing 737	29
Mcdonnell Douglas Aircraft Co MD 83	18
Douglas DC-9	8
Airbus A300	6
Mcdonnell Douglas DC-9	6
Airbus A320	3
Bombardier CL-600 Challenger and CRJ	1

How it failed the condition found, last ten years

corroded830cracked428damaged33punctured28canning4not reported4dented3worn3misrepaired2nicked2

Conditions found, as a table

	reports
corroded	830
cracked	428
damaged	33
punctured	28
canning	4
not reported	4
dented	3
worn	3
misrepaired	2
nicked	2

Engines most often reporting it

Pratt & Whitney JT8D-9A 1

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.