# PL.I.B — Airworthiness Requirements — Private Pilot Powered Lift ACS

> PL.I.B from FAA-S-ACS-13, including the official objective, references, notes, and 17 exact knowledge, risk-management, and skill descriptions.

Canonical HTML: [https://www.check-ride.ai/acs/powered-lift/private-pilot/pl-i-b](https://www.check-ride.ai/acs/powered-lift/private-pilot/pl-i-b)

Site reference: [https://www.check-ride.ai/llms.txt](https://www.check-ride.ai/llms.txt)

## Official Task context

- FAA document: Private Pilot for Powered-Lift Category Airman Certification Standards
- Identifier: FAA-S-ACS-13
- Published source date: November 2023
- Aircraft category: Powered Lift
- Certificate or rating: Private Pilot
- Area of Operation: Area of Operation I. Preflight Preparation
- Task: Task B. Airworthiness Requirements
- Task code prefix: PL.I.B
- Official references: 14 CFR parts 21, 39, 43, 91; FAA-H-8083-2, FAA-H-8083-25
- FAA source library: https://www.faa.gov/training_testing/testing/acs

## Official Task objective

To determine the applicant exhibits satisfactory knowledge, risk management, and skills associated with airworthiness requirements, including aircraft certificates.

## Knowledge elements

- **PL.I.B.K1** — General airworthiness requirements and compliance for aircraft, including:
- **PL.I.B.K1a** — a. Location and expiration dates of required aircraft certificates
- **PL.I.B.K1b** — b. Required inspections and aircraft logbook documentation
- **PL.I.B.K1c** — c. Airworthiness Directives and Special Airworthiness Information Bulletins
- **PL.I.B.K1d** — d. Purpose and procedure for obtaining a special flight permit
- **PL.I.B.K1e** — e. Owner/Operator and pilot-in-command responsibilities
- **PL.I.B.K2** — Pilot-performed preventive maintenance.
- **PL.I.B.K3** — Equipment requirements for day and night VFR flight, including:
- **PL.I.B.K3a** — a. Flying with inoperative equipment
- **PL.I.B.K3b** — b. Using an approved Minimum Equipment List (MEL)
- **PL.I.B.K3c** — c. Kinds of Operation Equipment List (KOEL)
- **PL.I.B.K3d** — d. Required discrepancy records or placards
- **PL.I.B.K4** — Standard and special airworthiness certificates and their associated operational limitations.

## Risk management elements

- **PL.I.B.R1** — Inoperative equipment discovered prior to flight.

## Skills elements

- **PL.I.B.S1** — Locate and describe aircraft airworthiness and registration information.
- **PL.I.B.S2** — Determine the aircraft is airworthy in the scenario given by the evaluator.
- **PL.I.B.S3** — Apply appropriate procedures for operating with inoperative equipment in the scenario given by the evaluator.

## Difficulty methodology

Difficulty calibration is ongoing for this Task. Observed difficulty is a privacy-thresholded check-ride.ai mock-oral practice proxy, not an FAA practical-test pass or fail rate. Underlying sample sizes and the private reporting threshold are not published.

## Use in practice

A mock examiner can ask a pilot to explain the published elements, apply them to the configured aircraft and airport context, identify risks, and defend a decision. Practice prompts are not represented as actual FAA examiner scripts or predictions of the questions a candidate will receive.