Baltia Air Lines Inc. (fka BLTA)

[mysterymeat]

If Songbird has not flown in 6 months, they are not dead yet with the DOT.
https://www.transportation.gov/sites/dot.dev/files/docs/Certificated_Packet_2012_final.pdf
Dormancy
If an air carrier does not institute air transportation operations within one year of being found fit by the Department to do so, its economic authority will be terminated for reason of dormancy as provided in section 204.7(a) of the Department’s Regulations. (See section 204.7 contained in Part III of this packet.) On the other hand, if an air carrier starts its air service within one year and subsequently ceases that service, its economic authority is automatically suspended and it has one year from the date of the cessation to resume service or that authority will be terminated for dormancy (see section 204.7(b)). Any air carrier proposing to resume service within the one year period must file with the Department’s Dockets Section, at least 45 days before the date on which service is expected to resume, a notice of such intent and updated fitness information as required by section 204.3. The air carrier may not recommence service unless and until it is authorized to do so by the Department. If the air carrier wishes to resume air service in less than 45 days, it may request a waiver from the 45-day advance notice requirements of section 204.7. Any such waiver request must be filed with Dockets or uploaded via www.regulations.gov. A $280 filing fee must be paid on www.pay.gov.
If, however, the air carrier will not be able to commence or recommence operations before the end of its one year, it may request a waiver from the revocation provisions of section 204.7. Such waivers are not granted routinely, but only where “good cause” is shown. In showing good cause, the company would have to provide adequate evidence that it still meets the Department's fitness criteria and that it has completed nearly all of the steps to initiate or resume operations (e.g., has the necessary personnel, financial resources, and aircraft, and has resolved any problems with the FAA). The waiver request must be filed before the end of the one-year dormancy period with Dockets or uploaded via
www.regulations.gov. A $280 filing fee must be paid online at www.pay.gov. (Sample waiver request applications are contained in Part II of this packet.)

Transfer of Authority
Certificates are not transferable without prior Department approval. Applications for transfer of certificate authority should be filed jointly by the transferor and the transferee with the Department’s Dockets Section at least 3 months in advance of the proposed effective date of the transfer. Additional time would be required if objections are filed or complex or unusual issues are raised by the application. Applicable filing fees, to be paid via www.pay.gov, are $290 (interstate authority) and $255 (foreign authority). Under section 41105 of the Statute, in order to approve a transfer, the Department must find that the proposed transfer is “consistent with the public interest,” that is, that the transferee is fit to conduct the proposed operations. The Department must also analyze the effects of the transfer on (1) the viability of each air carrier involved in the transfer, (2) competition in the domestic airline industry, and (3) the trade position of the United States in the international air transportation market. Applicants for a certificate transfer should describe the circumstances of the transfer, attach evidence supporting the fitness of the transferee as set forth in section 204.3, and provide sufficient information to enable the Department to analyze the effects of the transfer as noted above. In addition, a balance sheet for the air carrier immediately prior to and immediately following the projected closing date of the transfer, as well as copies of all agreements between the transferor and transferee, should be filed.

I haven't found anything yet regarding dormancy with the FAA.