Pilots facing revocation of their pilot certificate often have questions about how to requalify once the certificate is revoked. The answers can be found in FAA Order 2150.3 and in 14 CFR Part 61.
Unlike suspended certificates, which are reinstated after the suspension period, revoked pilot certificates become permanently invalid. Therefore, the pilot may not exercise any privileges of a revoked pilot certificate and must complete the application process to obtain a new certificate.
Pilots with revoked certificates need to apply and qualify for a new certificate, including retaking all written and practical tests. Regulations concerning requirements to qualify for the various types of pilot certificates and ratings are listed in 14 CFR Part 61. Pilots may use any experience requirements they have obtained before the revocation to meet any experience requirements for the new certificates, with the exception of specific requirements for training within a certain time period in preparation for the test (typically 2 calendar months). The knowledge and practical test standards are found in the Airman Certification Standards.
Unless otherwise authorized, pilots who have had their pilot certificate (or a flight or ground instructor certificate) revoked may not apply for a new certificate until a year has passed since the date of revocation per 14 CFR 61.13(d)(2). Some other certificate types also have a default revocation period (for example, mechanic certificates per 14 CFR 61.11(d)(2)), while others such as medical certificates do not (see 14 CFR Part 67).
Pilots facing certificate actions should seek legal advice tailored to their unique situation. A description of benefits available as part of the Pilot Protection Services membership is available here.