SA09862AC
Removal of original equipment manufacturer ladder and installation of a new design cabin entrance step assembly. Held by Sierra Industries LTD., which holds 94 approved modifications in all. Last revised July 14, 2017. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
- Models
- 501, 525, 525A, 525B, 551
- Type certificates
- A27CE, A1WI, A1WI, A1WI, A27CE
- On this site
- Cessna 525 CitationJet (CJ series) 1,970 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.