TPED Certification: FAA STC Support for Aircraft
Quick Answer: What Is TPED Certification?
TPED certification is the process of showing that an aircraft can safely tolerate the use of Transmitting Portable Electronic Devices, such as phones, tablets, laptops, Bluetooth accessories, and Wi-Fi-enabled devices, without interference to critical aircraft systems.
For many aircraft, TPED certification typically involves aircraft-specific review, critical systems evaluation, testing when required, FAA data package development, and Supplemental Type Certificate, or STC, support.
For aircraft owners, operators, MROs, completion centers, and VIP aircraft modification teams, TPED certification helps create a documented path for allowing transmitting device use onboard while supporting safety, compliance, and passenger expectations.
What Does TPED Stand For?
TPED stands for Transmitting Portable Electronic Device.
A TPED is a portable electronic device capable of transmitting radio frequency, or RF, energy. Common examples include:
- Cell phones
- Tablets
- Laptops
- Bluetooth accessories
- Wi-Fi-enabled devices
- Wireless headsets
- Smart devices
- Passenger or crew electronics with transmitting capability
The key difference between a general PED and a TPED is transmission. A Portable Electronic Device, or PED, may or may not transmit. A Transmitting Portable Electronic Device, or TPED, has wireless transmitting capability, which is why aircraft-specific evaluation may be required.
Why Does TPED Certification Matter?
TPED certification matters because modern aircraft rely on communication, navigation, avionics, and electrical systems that must operate safely and reliably.
Passengers and crews increasingly expect to use connected devices in flight. Phones, tablets, laptops, Bluetooth accessories, and Wi-Fi-enabled electronics are now part of everyday travel. In a typical environment, that convenience may seem simple. In an aircraft, it requires a higher level of technical confidence.
The question is not just whether a device works onboard.
The question is whether transmitting devices can be used without interfering with aircraft systems.
TPED certification helps support that answer with aircraft-specific data, testing when needed, and FAA certification documentation.
How Is TPED Certification Related to FAA Rules?
FAA rules address the use of portable electronic devices aboard aircraft because of the potential for interference with aircraft navigation or communication systems.
Under 14 CFR § 91.21, portable electronic device restrictions apply to aircraft operated by air carriers and commercial operators, and to any aircraft operated under IFR. The regulation also allows certain devices if the operator has determined that the device will not cause interference with the aircraft’s navigation or communication system.
That operator determination is an important part of the TPED conversation.
For aircraft operators, completion centers, MROs, and modification teams, TPED certification can help provide the technical basis for that determination. Instead of relying on assumptions, the aircraft can be evaluated through a documented process that may include testing, certification data, and FAA approval. FAA Advisory Circular 91.21-1D. provides guidance on the operator determination process for portable electronic devices.
What Is a TPED STC?
A TPED STC is a Supplemental Type Certificate that supports FAA approval for the use of transmitting portable electronic devices on a specific aircraft configuration.
An STC is used when an aircraft has been changed from its original type design. In the context of TPED certification, the STC can document that the aircraft has been evaluated for TPED tolerance and that the required data has been approved.
A TPED STC may be relevant when an aircraft owner or operator wants to allow transmitting device use onboard and needs a formal certification path to support that approval.
When Does an Aircraft Need TPED Certification?
An aircraft may need TPED certification when an owner, operator, MRO, or completion center wants to allow the use of transmitting portable electronic devices onboard and needs documentation showing that the aircraft can tolerate that use.
TPED certification may be especially relevant for:
- VIP aircraft modifications
- Cabin connectivity upgrades
- Interior completion projects
- Aircraft with custom cabin configurations
- Fleet standardization programs
- Rotorcraft and fixed-wing aircraft modifications
- MRO projects requiring FAA certification support
- Aircraft where passenger device use is part of the expected cabin experience
Not every aircraft requires the same level of work. Some aircraft may already be covered by existing approved data. Others may require additional review, testing, and FAA data package development.
Does Every Aircraft Need TPED Testing?
No. Not every aircraft needs new TPED testing.
One of the first steps in a TPED certification project is determining whether the aircraft model, configuration, and intended use case are already covered by existing approved data.
If approved data already applies, the project may focus more heavily on documentation and aircraft-specific certification support.
If approved data does not apply, TPED testing may be required to show that transmitting devices will not interfere with critical aircraft systems.
This early determination can make a major difference in project scope, timeline, and cost. That is why it is important to work with a certification partner that understands both the regulatory requirements and the practical aircraft modification environment.
What Is Involved in the TPED Certification Process?
The TPED certification process is aircraft-specific, but it typically includes several key steps.
1. Aircraft Eligibility Review
The process begins by reviewing the aircraft model, configuration, installed systems, and intended device use.
This step helps determine whether the aircraft may already be covered by existing approved data or whether additional testing and certification work may be required.
2. Critical Systems Evaluation
Next, the aircraft’s critical systems are reviewed to identify systems that could potentially be affected by transmitting portable electronic devices.
These systems may include communication systems, navigation systems, avionics, and other aircraft systems that must be protected from interference.
3. TPED Testing, When Required
If existing approved data does not cover the aircraft or configuration, testing may be required.
TPED testing helps evaluate whether transmitting devices create interference with aircraft systems. The results can support the certification data needed for FAA approval.
4. FAA Data Package Development
After the review and any required testing are complete, the certification data package is prepared.
This package may include aircraft-specific data, test results, compliance documentation, and supporting materials required for the STC approval process.
5. STC Approval and Aircraft-Specific Documentation
Once the FAA approval path is complete, the operator receives aircraft-specific documentation supporting the TPED approval.
This documentation can help support operational use, record keeping, future modifications, and fleet planning.
Why TPED Certification Is Important for VIP Aircraft
TPED certification is especially important for VIP aircraft because passenger experience is often central to the mission.
VIP passengers may expect to use phones, tablets, laptops, Bluetooth accessories, and other connected devices during flight. At the same time, VIP aircraft often include custom interiors, specialized avionics, cabin connectivity systems, and unique aircraft configurations.
That combination makes aircraft-specific certification support important.
A generic assumption about portable device use may not be enough for a modified aircraft. TPED certification helps evaluate the actual aircraft, actual systems, and actual operating environment.
For VIP aircraft owners and operators, this can support both the passenger experience and the technical documentation needed for safe, compliant operation.
TPED Certification for Parts 23, 25, 27, and 29 Aircraft
TPED certification can apply across multiple aircraft categories, including fixed-wing aircraft and rotorcraft.
Liberty Partners supports T-PED certification for:
- Part 23 aircraft
- Part 25 transport category aircraft
- Part 27 rotorcraft
- Part 29 transport category rotorcraft
This matters because each aircraft category can have different certification considerations. A small aircraft, transport category aircraft, normal category rotorcraft, and transport category rotorcraft may each require a different approach to review, testing, documentation, and STC support.
A certification partner with experience across aircraft categories can help identify the right path for each project.
TPED Certification vs. Cabin Connectivity: What Is the Difference?
TPED certification and cabin connectivity are related, but they are not the same thing.
Cabin connectivity typically refers to systems that allow passengers and crew to connect to Wi-Fi, internet, communication, or entertainment services onboard.
TPED certification focuses on whether transmitting portable electronic devices can be used without interfering with critical aircraft systems.
In many aircraft projects, these two needs overlap. A cabin connectivity upgrade may create a better passenger experience, while TPED certification helps support the aircraft-level approval path for transmitting device use.
For completion centers, MROs, and aircraft modification teams, it is important to consider both the cabin experience and the certification requirements early in the project.
Who Needs TPED Certification Support?
TPED certification support may be needed by:
- Aircraft owners
- Aircraft operators
- Fleet managers
- VIP aircraft completion centers
- MRO facilities
- Rotorcraft operators
- Fixed-wing aircraft operators
- Engineering teams
- Certification teams
- Aircraft modification program managers
If the project involves transmitting device use, cabin modernization, passenger connectivity expectations, or aircraft-specific FAA approval needs, TPED certification should be part of the discussion.
Choosing a TPED Certification Partner
TPED certification requires more than a basic understanding of portable electronics. The right partner should understand aircraft systems, FAA certification, STC development, critical systems testing, and the realities of aircraft modification projects.
When choosing a TPED certification partner, look for experience with:
- FAA STC development
- TPED tolerance testing
- Aircraft-specific data packages
- Critical systems evaluation
- VIP aircraft modifications
- Fixed-wing and rotorcraft certification
- MRO and completion center support
- FAA documentation and approval processes
The goal is not just to complete a test. The goal is to create a defensible certification path that supports safe operation, clear documentation, and long-term aircraft value.
How Liberty Partners Supports TPED Certification
Liberty Partners provides engineering, manufacturing, and FAA certification support for complex aircraft modification programs, including TPED certification. Liberty Partners completed our first T-PED STC in 2012.
Our T-PED program supports aircraft owners, operators, MROs, completion centers, and modification teams that need a practical path from initial aircraft review to FAA-approved documentation.
Depending on the aircraft and project scope, Liberty Partners can support:
- Aircraft eligibility review
- Existing approved data review
- Critical systems evaluation
- TPED testing when required
- FAA STC data package preparation
- Aircraft-specific documentation
- Certification support for Part 23, 25, 27, and 29 aircraft
Because Liberty Partners works across engineering, certification, manufacturing, and aircraft modification environments, we understand how TPED certification fits into the larger project.
Whether the goal is passenger device use, VIP cabin modernization, fleet standardization, or support for an MRO or completion program, our team can help move the project forward with clarity.
Need TPED Certification Support?
If you are trying to determine whether your aircraft needs TPED testing, a TPED STC, or aircraft-specific FAA documentation, Liberty Partners can help.
Our team can review your aircraft, configuration, and certification goals to determine whether existing approved data applies or whether additional testing and STC support may be required.